To finish the homework, he spent four hours _______ in the study.
#97225
A
locking
B
locked
C
locked himself
D
to lock
推荐题目
She was the only one __________ the wreck.
#88269
A
surviving
B
having survived
C
to survive
D
survived
.Professor White has received a letter ___ to give a lecture in Peking University.
#97324
A
to be invited
B
being invited
C
invited
D
inviting him
. _______ the meeting room,he found all the parents already _______ there.
#98463
A
To enter; sitting
B
Stepping into;to seat 
C
Entered; seat
D
Entering;seated