Have you ever wondered ______ there are so many natural disasters across the world in 2010?
A．which it is thatB．what is it that
C．how it is thatD．why it is that
D
考查強調(diào)句。本題考查強調(diào)句的疑問句形式：疑問詞 + is/was +it that +從句，根據(jù)句意用疑問詞why，故選D。
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