— These days I can only sleep for four or five hours at night as I’m too busy with my research work..— If you keep going on like that, you are sure to ______ sooner or later.

 They are living with their parents for the moment because their own house __________.

After the former manager returned from abroad, our company _________and the production doubled. 

—You speak very good French !—Thanks . I __________ French in Sichuan University for four years.

At the news conference the Foreign Minister spoke slowly so as to ______ what he would say.