— Was his father very strict with him when he was at school?— Yes. He has never praised him ____________ he became one of the top students in his grade.
A. after
B. unless
C. until
D. when
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He made a mistake, but then he corrected the situation ____________ it got worse.
A. until
B. when
C. before
D. as
_________ I know the money is safe, I shall not worry about it.
A. Even though
B. Unless
C. While
D. As long as
You should try to get a good night’s sleep ________ much work you have to do
A. however
B. no matter
C. although
D. whatever
It was evening ________ we reached the little town of Winchester .
A. that
B. until
C. since
D. before