We will be given a(n) to ask questions at the end of the lecture.
| A．presentation | B．explanation | C．opportunity | D．possibility |
Mr. Smith is one of the foreign experts who ___________in China.
| A．works | B．is working | C．are working | D．has been working |
They are letting us use their computers, and ___________we are giving them the results of our research.
| A．in turn | B．in theory | C．in return | D．in general |
He ___________all his pockets but failed to find his passport.
| A．searched | B．searched for | C．in searched of | D．looked for |
Every minute is made full _______ of _______ our lessons well.
A. to use; study B. use; studying C use; to study D. used; studying
----My sister is very upset today.
-----It’s your fault. You ________ the bad news to her yesterday.
| A．should tell | B．should have told | C．shouldn’t have told | D．must tell |