You can’t imagine the difficulty he _____ onto the cliff and saving the boy in trouble. 
#103306
A
had to climb
B
had climbed
C
had climbing
D
had on climbing
推荐题目
 I didn’t hear you because I __________ the news on the radio.
#100146
A
listen to
B
am listening to
C
listened to
D
was listening to
——Can I join your club,dad? ——You can when you______a bit older. 
#103502
A
get
B
will get
C
are getting
D
will have got