_____ all the inventions have in common is ______ they have succeeded.
A. What; what | B. That; what |
C. What; that | D. That; that |
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
A.of;at | B.by;in | C.of;on | D.on;at |
In American there are more households with pets than ______ with children.
A.those | B.these | C.ones | D.that |
They are said to have developed a new ______ to teaching, which is said to improve classroom teaching greatly.
A.method | B.means | C.way | D.approach |
The first one ______ will get a beautiful gift.
A.arrived | B.arriving | C.arrives | D.to arrive |
Children, who grow up in a friendly family, are more ______ to get along wellwith others.
A.similar | B.probable | C.likely | D.possible |