________the working efficiency，the boss allows the employees to have a coffee break.
#88719
A
Improving
B
To improve
C
Having improved
D
Improved
推荐题目
Please tell me the after service of the computer; I’m worried about a breakdown sometime．
#90678
A
there being
B
it being
C
there is
D
it is
An old lady came to the bus stop only the bus had gone.
#95640
A
to run ; to find
B
running;to find
C
and ran ; finding
D
running; finding
________ at the cafeteria before，Tina didn’t want to eat there again.
#89508
A
Having eaten
B
To eat
C
Eat
D
Eating
____our mother will allow ____ to see a film after supper?
#88575
A
Who do you think, leaving
B
Who do you think, to leave
C
Do you think who, leaving
D
Do you think who, to leave
.The American soldiers_______ Iraq kissed their family goodbye and left in a hurry.
#97604
A
are sending to
B
sending to
C
to be sent to
D
are sent to