超星 - Exeercise 1 - 查题吧

单选题

It's really dangerous to work on the roof. ___, you should take care of yourself.

A. Therefor
B. However
C. Otherwise
D. Yet

单选题

She sold her house ___ she can't help regretting it.

A. or
B. for
C. but
D. so

单选题

His children are well-behaved, ___ those of his sister's are very naughty.

A. and
B. whereas
C. thus
D. so

单选题

Progress so far has been very good. We are, ___, confident that the work will be completed on time.

A. therefore
B. moreover
C. however
D. nevertheless

单选题

He is a nice listener, ____ he feels the time is right he will give you his thoughts.

A. until
B. after which
C. if
D. and when

单选题

How can you keep fit ___ you smoke so much?

A. as
B. while
C. when
D. for

1