真题练习

647.Something must be done to prevent our city _____ by thick smoke.

A.to be polluted
B.from polluting
C.from being polluted
D.polluting

648._______ the obvious differences in size and population,the states of America have many things ________ common.

A.Although;on
B.Though;in
C.In spite of;in
D.Because of;on

647.答案是C;prevent our city from being polluted 阻止城市受污染。

648.答案是C;have sth.in common with sb.与某人有共同之处。