--When did your father come back last night?
--He didn't come back _______ he finished all the work.
A. until B. while C. if
I will stay at home and read books if it _______ tomorrow.
| A．is raining | B．rains | C．rain | D．will rain |
She _______ a lot of money on clothes.
| A．takes | B．costs | C．spends | D．buys |
We got mad ______ the team for losing the match.
| A．at | B．in | C．on | D．about |
I got home _____ they were having dinner.
| A．as soon as | B．while | C．because | D．After |
---Could we buy a piano， Jack?
---I’m afraid there ______ enough room for one in the house.
| A．aren’t | B．are | C．isn’t | D．is |