When I called you this morning, nobody answered the phoneWhere __________?

The use ofChinese by teachers in ______ English classroom must be restricted because itwill decrease _______ time when students are exposed to the English language

Jack is ______go to school,so his mother has to stay at home to look after him

.We’ve offered her the job, but I don’t know______ she’ll accept it.

I think English is ____unimportant subject.—I don’t think so. It is ____useful tool when we talk with foreigners.