He was busy writing a story，only _________ once in a while to smoke a cigarette．
#98279
A
to stop
B
stopping
C
to have stopped
D
having stopped
推荐题目
Last week, we paid a visit to a man, ____ as a famous actor
#92251
A
knowing
B
known
C
to know
D
to be known
Jr. Parkinson stood up and left the room, ____ the door behind him.
#96245
A
closing
B
closed
C
close
D
to close
---What is our earth like ________from the moon? ---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".
#96713
A
seen; covering
B
seen; to cover
C
seeing; covered
D
seeing; covering
_______ with so much trouble，we failed to complete the task on time.
#95516
A
Faced
B
Face
C
Facing
D
To face.