While she _______ TV in the sitting room, the bell _______.
| A．watches; rings | B．was watching; rang |
| C．is watching; rang | D．was watching; was ringing |
______ trees were cut down. And many birds lost their home.
A. Two thousandsB. Thousand of C. Thousands of
She likes reading. She usually________ some books from the library.
A. buys B. lends C. borrows
In the past few years there _________great changes in my hometown .
A. have been B. were C. had been
一Look at the girl with a pair of glasses over there．Can you tell me _______?
一She is a nurse．
A．who is she B．who she is C． what she is
－What shall we do tomorrow?
－_______it rains hard, we’ll stay at home.
A. So B. Since C. If