—____ your sister know Tom? —No, she ____.
| A．Do; don’t | B．Does; doesn’t | C．Do; do | D．Does; does |
Yesterday morning I was just leaving_______ the telephone rang.
| A．when | B．while | C．because | D．since |
-When did your computer go wrong?
-Last night, while I_______ some music from a website.
| A．downloaded | B．am downloading |
| C．was downloading | D．have downloaded |
The girl devoted all her time she had_______ others.
| A．to help | B．helping | C．to helping | D．helped |
_______ he brought us!
| A．What a good news | B．What good news |
| C．How good news | D．How good a news |
There are many trees on_______ side of the street, and_______ of the trees is still growing.
| A．both; the number | B．either; the number |
| C．both; a number | D．either; a number |