Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
A.of; at | B.by; in | C.of; on | D.on; at |
Look out! Don’t get close to the house, ______ the roof is under repair.
A.whose | B.which | C.of which | D.that |
Quite a few people like traveling, for it can increase their knowledge and broaden their _____.
A.features | B.horizons | C.heritage | D.reservations |
________, a man who espresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.
A.To be equal to other things | B.Other things to be equal |
C.Were other things equal | D.Other things being equal |
_____ is obviously right is to give all children equal opportunities to develop their special gift.
A.Which | B.What | C.That | D.It |
Take care not to get your shoes ______ in mud.
A.wet or covered | B.to be wet or covered |
C.to be wet or covered | D.wet or be covered |