单项选择(每题1分)
We must think twice _____ we make the final decision.
A.when | B.while | C.until | D.before |
-Jenny took the 8:00 bus to Guangzhou this morning.
-Really? He__the 9:00 train. It's much more comfortable and safer to travel by train.
A.could have taken | B.should take |
C.must have taken | D.can take |
Junk messaging has been a headache for years, __the action taken by the authori-ties has not yet produced the results expected
A.as | B.but | C.so | D.before |
Most museums are just for looking. But today some of them have things for you to touch.The __say,“__”
A.signs; Do touch | B.notices; To touch |
C.signals; Be touching | D.signs; No touching |
After chatting online for along time, Mary looked up, __that it was 11:00 pm, long past her usual bedtime.
A.to see | B.saw | C.seeing | D.seen |
He is a strict but kind teacher, __my son loves and respects.
A.one | B.he | C.the one who | D.he who |