單項(xiàng)選擇題

Professor Wang ,（）for his informative lectures, was warmly received by his students．

A.knowing
B.known
C.to be known
D.having known

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單項(xiàng)選擇題

"（） your meeting is!" he offered them his sincere congratulations．

A.How a great success
B.What a great success
C.How great success
D.What great success

單項(xiàng)選擇題

（）evidence that language acquiring ability must be stimulated．

A.If being
B.It is
C.There is
D.There being