This problem is said _______ three times, but he still can’t understand it.
#90815
A
to have been explaining
B
to have explained
C
having been explained
D
to have been explained
推荐题目
_____ to give up smoking, he threw away his _____ cigarettes.
#95988
A
Determined; remained
B
Determined; remaining
C
Determining; remained
D
Determining; remaining
 _________working all day long, he fell asleep as soon as he lay on the bed.
#89761
A
Getting tired of
B
Getting tired from
C
To get tried of
D
To get tired from
It’s reported that energy drinks are not allowed ___ in Australia.    
#89833
A
to be making
B
to be made
C
to make
D
to have been made
To be honest, a lot of people attach great importance to ______rich and famous.
#92238
A
become
B
have become
C
having become
D
becoming