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Many students didn’t realize the importance of study _______ they left school.
#57914
A
when
B
until
C
after
D
unless
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How many words have you learned_____ you began to learn English?
#55540
A
for
B
if
C
before
D
since
Oxfam Trailwalker is for helping ____ poor in Hong Kong and ____other parts of Asia and Africa.
#56482
A
不填; the
B
the; the
C
the;不填
D
不填; 不填
He met many problems------ he was going over his lessons.
#57608
A
before
B
as soon as
C
since
D
while
Don’t get off the bus _____ it has stopped.
#57377
A
after
B
when
C
if
D
until
My friend Max started to play football ______ he was seven years old.
#56636
A
since
B
when
C
if
D
while