You should study harder______ it is too late to catch up.
#55841
A
if
B
when
C
after
D
before
推荐题目
______Jenny is kind, ______we all like her. 
#55604
A
Because; so
B
So; because
C
/; because
D
/; so
—What’s the matter with you? You look so worried.-- I don’t know ___________ the problem.
#57173
A
what to solve
B
how to solve
C
to solve what
D
how can I
You’ll be late __________ you don’t get up now.
#58328
A
if
B
before
C
until
D
after