In recent years the consumption of aspirin _______ enormously in America.
A was increasing B. has increased C. had increased D. will be increasing
—Do you think you could successfully light the flame at the opening ceremony?
—_______. This is not the first time for me.
| A．Take care | B．Hurry up | C．Not exactly | D．Don’t worry |
The father and the son entered the tiger area _______ two doors were open at the time.
Suddenly five tigers appeared, one of which killed the father.
| A．there | B．which | C．its | D．whose |
Gilbert wasn’t ______ the time this morning, so he was late for school.
| A．involved in | B．particular about | C．linked to | D．aware of |
Weshouldconsidertheprofessor’s advice _______ our school library provide more books on popular science.
| A．that | B．when | C．which | D．where |
If Newton lived today, he would be surprised by what _______ in science and technology.
| A．had discovered | B．had been discovered |
| C．has discovered | D．has been discovered |