When the teacher ______ how to do the experiment, the bell rang.
#37863
A
explains
B
will explain
C
was explaining
D
is explaining
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We will have a picnic if it _____ tomorrow.
#40423
A
won’t rain
B
didn’t rain
C
doesn’t rain
D
isn’t raining
一Have you mended your bike，Bob?一Yes，I______it twenty minutes ago.
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A
have mended
B
mend
C
had mended
D
mended
Mr. Black is going to marry a girl he __________ in Japan last year.
#42139
A
meets
B
met
C
has met
D
would meet
--What you for your vacation? --I plan to visit my grandparents.
#40530
A
do, do
B
are, doing
C
did, do
D
are, do