His sister left home in 1998,and_______ since .
| A．had not been heard of | B．has not been heard of |
| C．had not heard of | D．has not heard of |
Tom was about to close the window ______ his attention was caught by a bird.
| A．when | B．if | C．and | D．till |
It is in the hotel _____ he stayed last night ______ he lot his mobile phone.
| A．that ; that | B．that ; where | C．that; when | D．where; that |
Lydia doesn’t feel like ________ abroad. Her parents are old.
| A．study | B．to study | C．studied | D．studying |
The book about environment ______ the importance of protecting the earth.
| A．starts | B．states | C．tells | D．says |
It was ______ back home after the experiment.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |