We couldn’t understand: what could ______ his sudden change of mind? 
#66037
A
enjoy
B
explain
C
accept
D
mean
推荐题目
Though difficult, I ________ him find a job, which made him very pleased. 
#68919
A
tried to help
B
managed to help
C
tried helping
D
succeeded to help
I usually don’t wake up until my alarm _______ every morning.
#74691
A
switches off
B
gives up
C
puts up
D
goes off