I’m sorry you’ve been waiting so long , but it will be an hour       David gets back .
#31813
A
before
B
since
C
till
D
after
推荐题目
The reason ________ he didn’t come was _______ he was ill.
#31733
A
why; that
B
that; why
C
for that; that
D
for which; what
_______the people have become masters of their country _______ science can really serve the people. 
#32678
A
It is only then; that
B
It was that; when
C
It is only when; that
D
It was when; then