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I didn’t know he came back __________ I met him in the street .
#58461
A
since
B
when
C
until
D
after
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You will achieve nothing _        you work hard.
#58380
A
if
B
unless
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when
D
that
You won’t feel happy at school ___ you get on well with your classmates.
#55528
A
though
B
when
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unless
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 Her father __________ time.     
#58552
A
usually waste
B
never wastes
C
hardly ever waste
D
always wasting
We won’t start the meeting     Miss Wang comes.
#57482
A
since
B
until
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while
D
so
---_______do you send e-mails to your pen friend?  ------Once a month.
#56239
A
How long
B
How far
C
How much
D
How often