Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
#38768
A
explains ; to
B
has explained ; for
C
has explained ; to
D
explained ; with
推荐题目
Alice has gone to the classroom and she didn’t say .
#38161
A
how did she come back
B
how soon would she come back
C
when she came back
D
when she would come back
---You were out when I went to your house this morning. ---Oh, I _______ for a friend from England at the airport.
#40468
A
was waiting
B
waited
C
am waiting
D
have waited
Simon is his English book, but he can’t _______ it.
#41948
A
looking for, find
B
finding, look for
C
looking after, look for
D
looking at, find