问题

________he referred to in his article was often discussed by many people in the past.

A:That
B:What
C:Whether
D:Where

正确答案是：

同类题型

Lisa’s cat _________ her hat.

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The girl Mary, and telephone number is 3624385.

r, at times this balance in nature is disturbedby human activities, _______ a number of possibly unforeseen effects

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