__________ evidence that latiguage-acquiring ability must be stimulated.
A. It being
B. It is
C. There is
D. There being
查看答案
It' can be inferred from the passage that
A. some radio broadcasting stations use hotlines for advertisements.
B. it is not a good idea for some radio broadcasting stations to use hotlines.
C. some people use hotlines in a wrong way.
D. some people have unclear thoughts.
What is discovered by scientists at Brown University？
A. The inhibitor of the HIV transrmssion.
B. An effective way to deliver AIDS drugs.
C. A good strategy to prevent HIV transmission.
D. Bacteria from yogurt may help fight HIV.
正确答案是（）
A. however
B. whereas
C. with
D. though
正确答案是（）
A. bottoms
B. lengths
C. depths
D. darkness
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