In order not to be disturbed, he spent two hours ____ in his study.
#89452
A
locking
B
to lock
C
locked
D
being locked
推荐题目
_____many times, they succeeded _________ the experiment.
#96579
A
Having tried; in doing
B
Tried; in being done
C
Having tried; to do
D
Tried; doing
It’s no use ______ with him ______ this matter.
#97739
A
arguing; for
B
arguing; over
C
to argue; over
D
to argue; about
After describing the planned improvements， she went on _____ how much they would cost.
#98758
A
to explain
B
explaining
C
to be explaining
D
having explained
—Grace, when shall we take a walk? —After I finish________ the dishes.
#94292
A
wash
B
washing
C
washed
D
to wash
The best way Tom suggests one’s strength is to run for 30 minutes every day.
#94402
A
building up
B
to build up
C
build up
D
being built up