（）using the derrick at once, the gosseneck is bent.
Each lifeboat must be lowered and maneuvered in the water at least once every（）.
It was demanded that the injured crewmembers（）at once.
All lifeboats，rescue boats，and rigid-type liferafts shall be stripped，cleaned，and thoroughly overhauled at least once every（）.
（）in the leg, the soldier was sent to hospital at once.
He never（）to read the news but turned at once to the crossword puzzle on the last page.
She fell ill and（）a thorough examination at the hospital.
（）using the derrick at once，the gooseneck is bent.
At several dozen passes along the Great Wall, ________ came into being.
He is the racer (who/whom) I believe fell at the finish line.
How long is the Great Wall at present?
In our PPT, instead of showing all the pictures, charts, and texts in one single slide all at once, we should be progressive when showing our PPT.
You____pay the money, but you____do so at once.
It is necessary that the meeting _____ at once.
_____ of decorating houses at preset, that of papering interior walls was probably the most popular.
4.Once your time at the company is up, you should leave without ____ .
Once shipment of the goods is finished， the sellershould present all the documents to the（）of paymentunder the terms of the credit.
16：What do you think Mr. Kelly will do at once after the conversation？
In the case of loans, the whole amount advanced is at once credited to the customer ’s ___.
Their idea was to get us to______the strike at once.
_______ we have all the material ready,we should begin the new task at once.
Once the______contradiction is grasped, all problems will be readily solved.
To ensure the normal running of the device, the air filters should be cleaned at least once every()days.
_______ of danger, he jumped into the into all at once（）
