If you are stuck, change to a new point.‘To be stuck’means to be sure of something.
Before counterflooding to correct a list，you must be sure the list is due to（）.
— Are you sure about that? —（）
While you are on watch entering port，the Master gives the helmsman a rudder command which conflicts with a rudder command from the Pilot.You should make sure the helmsman（）.
Are you sure there is no danger of ____ now? (infect)
If a person is not quite sure about how to find a certain place, you might_________.
The Internet is a powerful tool, but make sure that you use it wisely for all the good value it offers and that you won’t let too much of a good thing become something bad. ( )
Do not attempt to do a thing unless you are sure of yourself, but do not ____ it simply because someone else is not sure of you.
A tourist is going to reserve an air ticket to Paris. But he is not sure about the return date. So what kind of ticket would you suggest him to book?
Mr. Black, _______you know, is a skilled repairman and you can get your damaged car repaired in his garage.
Before you think about asking for a promotion, make sure that either a position opening exists ______ a new position is needed to be created.
听力原文：W: Tomorrow is the deadline to hand in the term paper. Are you sure you've corrected all the typing errors in this paper？
What can you always do if you are not sure what to do？
You are approaching another vessel and are not sure whether danger of collision exists.You must assume ()
听力原文：M: Mrs Hunt, are you sure it is the man who you saw in last nights robbery？ Now look at him again and this is very important. W: Im absolutely sure about him. Q: Whats the probable relationship between the two speakers？2．
“Are you worried about your son being alone in a strange country ”“ .I’m sure he’ll manage fine.”
Another aspect of C that's worth mentioning here is that it is, to put it bluntly, a bit dangerous. C does not, in general, try hard to protect a programmer from mistakes. If you write a piece of(66)which will(through some oversight of yours)do something wildly different from what you intended it to do, up to and including(67)your(68)or trashing your(69), and if it is possible for the(70)to compile it, it generally will. You wont get warnings of the form. "Do you really mean to... ？" or "Are you sure you really want to... ？". C is often compared to a sharp knife :' it can do a surgically precise job on some exacting task you have in mind, but it can also do a surgically precise job of cutting off your finger. It's up to you to use it carefully.
听力原文： President Bush is renewing sanctions on the Tale. ban forces that control most of Afghanistan. Meanwhile, administration officials say they are trying to convince other countries to put pressure on the Taleban to turn over suspected terrorist leader Osama bin Laden. The sanctions were originally imposed by former President Clinton in 1999 and renewed a year later. President Bush says they are still needed today.
听力原文：W: Are you sure this is the right way to the laboratory？ I can't afford to be late.
When you know you are going to be introduced to others, be sure your right hand is free.()
To make sure that you can feel confident of delivering a professional presentation that suits your style, you need to make 3 Ps&8212;&8212;they are____（）
One silly question I simply can't stand is "How do you feel？". Usually the question is asked of a man in action --- a man on the go, walking along the street, or busily working at his desk. So what do you expect him to say？ He'll probably say, "Fine, I'm all right," but "you've put a bug in his ear" -- maybe now he's not sure. If you are a good friend, you may have seen something in his face, or his walk, that he overlooked that morning. It starts him worrying a little. First thing you know, he looks in a mirror to see if everything is all right, while you go merrily on your way asking someone else, "How do you feel？"
-----Do you know what the Bush House is like？ ----- Yes. It’s a（an） _____ building and it is the home of BBC English.
Mr. Kerry struck back, trying to turn the tables on Mr. Bush. In a speech at Howard University in Washington, Mr. Kerry said he would provide more tax cuts to the middle class than Mr. Bush would and
