---How long did it ________you to solve the problem?
---I _______about half an hour on it.
| A．take; took | B．spend; took |
| C．spend; cost | D．take; spent |
---What are you going to do this weekend ?
--- Well, we’ll clean up the city parks ________ it rains..
| A．if | B．until | C．while | D．unless |
---You’ve chatted for nearly two hours.
--- Yeah. We’re talking about the things ______ happened yesterday.
| A．what | B．that | C．when | D．where |
It’s raining hard, so we have to _______ the sports meeting.
| A．put down | B．put off | C．hold on | D．take part in |
--- Nancy? You have straight hair !
--- Yeah, it _____ be curly.
| A．wanted to | B．loved to | C．used to | D．helped to |
—Excuse me. Where is the museum?
—It is quite far. It will take you half ___ hour to go there by _____bus.
| A．an; / | B．an; a | C．a; / | D．/; / |