【单选题】
I don’t think you’ll be able to understand this formula（公式）___ you finish school.
①
as if
②
only when
③
even
④
even when
【单选题】
19._____ all this work and so little sleep at night, I don’t think I can go on much longer.
①
What about
②
What if
③
What with
④
What for
【单选题】
Why don’t you travel to New York on vacation?
①
I don’t want to go
②
Excuse me, because I can’t
③
I want to, but I haven’t got enough money
④
Because I’m going to school today
【单选题】
I don’t think you can work out the maths problem ___ her help.
①
since
②
unless
③
with
④
without
【单选题】
13.Don’t ______ to let me know if there’s anything I can do for you.
①
thrill
②
hesitate
③
reject
④
puzzle
【单选题】
If you work hard, you will be ________; but if you don’t, you will be punished.
①
relaxed
②
relieved
③
reduced
④
rewarded