When the teacher ______ how to do the experiment, the bell rang.
#37863
A
explains
B
will explain
C
was explaining
D
is explaining
推荐题目
Tom often makes his brother___but yesterday he was made___ by his brother.
#42374
A
cry; to cry
B
to cry; cry
C
cry; cry
D
to cry; to cry
We will visit the Summer Palace if it          tomorrow.
#39815
A
will rain
B
rains
C
won’t rain
D
doesn’t rain
What _____you ______ at 10:00 last night?
#40223
A
did; do
B
were; doing
C
was ;doing
D
have; done