-----Tom. You look very bored and tired.-----Yes, I ______ my father on the farm until seven o’clock this morning.
#104828
A
have been helping
B
had helped
C
was helping
D
am helping
推荐题目
Listen to the two girls by the window. What language ________?
#100338
A
did they speak
B
were they speaking
C
have they been speaking
D
are they speaking
—Could I use your car tomorrow morning?—Sure.I________a report at home. (2013·江苏，25)
#99440
A
will be writing
B
will have written
C
have written
D
have been writing
Taiyuan, a city in North China, was struck by a heavy snowfall last week, ______ serious traffic problems.
#103388
A
to face
B
faced
C
having faced
D
facing
With the development of modern society, E-mail as well as telephones an important part in daily communication.
#101452
A
have played
B
is playing
C
are playing
D
played
—How did she get infected? —She ____ the viruses without any protection.
#101750
A
exposed to
B
had exposed to
C
was exposed to
D
has exposed to