He was busy writing a story, only ______ once in a while to smoke a cigarette.
#4946
A
to stop
B
stopping
C
to have stopped
D
having stopped
推荐题目
--- Where is the post office ? --- Go to the ______ and you’ll see the post office ______ the street．
#4642
A
bicycle’s shop ; cross
B
bicycle shop ; across
C
bicycles shop ; cross
D
bicycles’ shop ; across
Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.
#4678
A
producing
B
having been produced
C
to be produced
D
produced
. Being out of order, ______ to the factory.
#4726
A
he sent his computer
B
he drove at once
C
his computer was sent
D
his father helped him send it
The style of Western art has changed many times ______ Chinese art has changed less often.
#4706
A
while
B
before
C
since
D
however