. In our class, when the bell rang and the teacher closed his book, it was a ______for everyone to stand up.
Rather than carry out the project by itself, the company planned to _________ with other potential cooperators.
The driver started to speed up to ______ for the hour he had lost in the traffic jam.
The doctor advised her to eat more bean products _____meat which might be harmful to her heart disease.
We express our thoughts not only ________ words, but also body language.
_____________ hard you try,it is difficult to lose weight without cutting down the amount you eat.