— should teenagers spend at least 30 minutes taking exercise?
—Five times a week，according to some reports．
| A．How much | B．How soon |
| C．How long | D．How often |
--Ann has finished her homework, hasn’t she?
--Yes. She ______it an hour ago.
| A．finished | B．finishes |
| C．has finished | D．will finish |
.I heard a new song on the radio.I ______high and low in the music store, but I can’t find the song.
| A．search | B．have searched |
| C．am searching | D．will search |
Get up early,______you’ll be late for school.
| A．so | B．and | C．or | D．but |
Could you tell me how long _____the football club?
| A．you have joined | B．have you joined |
| C．you have been in | D．have you been in |
--________ How long haven’t you cleaned your room?
--Two months at least
--No wonder(难怪)it’s so untidy.
| A．What a mess! | B．What a shame! |
| C．What bad weather! | D．What a bad experience! |