The old man __________ in Tibet for two years as a volunteer teacher;it is an experience he  often mentions.
#101367
A
served
B
serves
C
is serving
D
has served
推荐题目
-When shall we set off?-We ____ start off at five o’clock if it ___ raining by then. 
#100520
A
will; has stopped
B
are about to; stops
C
are going to; will stop
D
are to; will stop
—Sorry. I ________ to post the letter for you. —Never mind. ________ it myself after school. 
#104473
A
forget; I’d rather post
B
forgot; I’ll post
C
forgot; I’m going to post
D
forget; I’d better post
I saw Sue but she didn’t see me. She _______ the other way.
#103238
A
was looking
B
looked
C
had looked
D
would look