Radio communication（）for many years and helps to save tens of thousands of lives.
When daylight savings time is kept，the time of tide and current calculations must be adjusted.One way of doing this is to（）.
Many people save money to（）for their old age.
How many students went to the hockey game?（）
Do you remember how many times ____ to Australia?
Hard times are forcing community colleges to _________ students.
How many times did Empson come to China?
The children ____ many times not to get closed to the fire.
According to educational advisers, how many months of expenses should be ensured by foreign students?
The children ____ many times not to play with fire.
According to the survey, many students should cut back ____ their work hours to devote to their study.
Give students time to write and ____________ .
Using a microwave oven to heat up or cook food is time-saving.
听力原文：W: Many Chinese students just don't open their mouth to say anything in a classroom.
But in recent years, many older people ______by the banks to invest their savings in high-yielding money-market accounts.
What time is thought to be the best time for releasing many new movies？
Many students will watch TV only to______ time during the summer vacation.
Every day many students are driven to struggle （) a happy and better future.
What's the main purpose for many student exchange organizations to establish scholarships and special projects？
This new method not only saves time but also saves energy ________ operating on two batteries instead to four.
Many people nowadays save money to_______for their old age.
Many Chinese students return to China when they meet many problems and difficulties abroad.
The job of a student accommodation officer______a great many visits to landladies. （2006年考试真题）
Many students pay___ to their mobile phones（）
