----In recent years, _____problem of global warming has become very serious.
----That’s right. People are facing _____diversity of natural disasters now.
A./, a | B.a, the | C.the, a | D.a, a |
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----In recent years, _____problem of global warming has become very serious.
----That’s right. People are facing _____diversity of natural disasters now.
A./, a | B.a, the | C.the, a | D.a, a |