The cultural background of China is totally different from ________ of the US.
If it was not an accident, he must have done it .
Because prices of food and clothing and almost everything else in that country have steadily gone up, the buying of the dollar has gone down.
——What’ s the matter?—— The shoes don’ t fit properly.They____my feet.
In this experiment, they are woken up several times during the night, and asked to report what they____.
.When he was alive, the old scientist used to say that knowledge ____from practice and he gained his experience by doing a lot of practical work.