You will never gain success________ you are fully devoted to your work.
A.when B.because C.after D.unless
Among the many dangers__________ sailors have to face, probably the greatest of all is fog.
A.which B.what
C.where D.when
The climate here is quite pleasant, the temperature rarely, ________, reaching 30℃ in summer.
A.if not B.if ever C.if any D.if so
Until now, we have raised 100,000 pounds for the poor children, ___________ is quite unexpected.
A.that B.which C.who D.it
I'll be out for some time. ______ anything important happens, call me up immediately.
A.In case B.As if
C.Even though D.Now that
I’ve ordered some pizza, so we _______ worry about cooking when we get home tired.
A.can’t B.dare not C.needn’t D.may not
