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
During the next ten years, she had to work hard _____ for the necklace.
#98321
A
paying
B
to pay
C
for paying
D
in order to paying
 I'm busy now. I'm sorry I can't help ____ the flowers. 
#98051
A
watering
B
watered
C
waters
D
to water
The temple , _______ the Song Dynasty ,was pulled down last month. 
#91189
A
which dating from
B
which was dated from
C
dated from
D
dating from