问题

When he was told the result of the research,there was a expression appearing on his face.[ ]

A: puzzle; puzzling
B: puzzling; puzzling
C: puzzled; puzzled
D: puzzling; puzzled

正确答案是：

同类题型

I ______ to send him a gift to congratulate him on his marriage, but I _____ it

I’m writing this letter ________ mymother, who wants to thank you for your nice gift.

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is our hope that improve ments in health care will lead to a stronger, more prosperous economy.[ ]

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