The experts were doing their experiment in the lab, ______ what happened outside.
| A．didn’t know | B．not knew |
| C．not knowing | D．having not known |
—Why didn’t you help him?
—I __________, but I didn’t have the money.
| A．I did have | B．I would have | C．will have | D．must have |
The new tax would force companies to __________energy-saving measures.
A. adapt B. adopt C. adjust D address
_________is no possibility __________Bob can win the first prize in the match.
| A．There；that | B．It；that | C．There；whether | D．It；whether |
__________at a college or university in the US, Chinese and other international students must demonstrate a strong ability in both spoken and written English.
| A．Being accept | B．Accepted |
| C．To be accepted | D．Having been accepted |
—Why don’t we choose that road to save time?
—The bridge to it __________.
| A．has repaired | B．is repaired |
| C．is being repaired | D．will be repaired |