— Why haven’t you asked her to come here?
— She _______ an important experiment when I found her and she _______ it.
| A．had done; didn’t finish | B．was doing; hasn’t finished |
| C．did; wouldn’t finish | D．did; hadn’t finished |
We shall not start the project until it __________ by the committee.
| A．will be approved | B．approves |
| C．has been approved | D．is to approve |
The British team, ______ several attempts to climb Yulong Xueshan, decided to have another try this summer.
| A．making | B．having made | C．to make | D．made |
－Mary, how did your Math test go?
－I had thought I _________, but in fact I came in the top 10 in my class.
| A．should have failed | B．couldn’t have failed |
| C．might have failed | D．shouldn’t have failed |
—Guess what! We’ve got our visas for a short-term visit to the UK this summer.
—How nice! You ____ a different culture then.
| A．will be experiencing | B．have experienced |
| C．have been experiencing | D．will have experienced |
____ to everyone the importance and value of these historic sites, the government has strengthened regulations to protect them.
| A．To stress | B．Stressing |
| C．Having stressed | D．Stressed |