There no buses, we had to walk home after work.
| A．was | B．were | C．being | D．had |
Mary is short__________ her brother is very tall.
| A．still | B．nor | C．while | D．when |
There was less food for birds and also for the Prairie dog, an______holes in the ground.
| A．livs | B．is living | C．living | D．lived |
--Do you mind if I smoke here?
--____________.
A. Sure. Go ahead B. No. Go ahead C. Yes. Please
Even on holidays, he preferred doing something________
| A．to sleep | B．sleeping | C．to be slpet | D．to sleeping |
I hope there are enough glasses for each guest to have___________.
| A．one | B．不填 | C．them | D．to |