There was something wrong with the network, or the e­mail ________ earlier.
#86491
A
could have been sent
B
might be sent
C
need have been sent
D
must be sent
推荐题目
I ______ sooner but I didn’t know that they were waiting for me.
#87679
A
had come
B
was coming
C
would come
D
would have come
It’s required that the students___ mobile phones in their school, so seldom ____ them using one.   
#87521
A
not use; will you see
B
should not use; you will see
C
don’t use; will you see
D
would not use; you will see