题目内容
How to control housing price is said to a great challenge facing the government over the past few years.
| A.become | B.becoming | C.have become | D.be becoming |
C
本题考查非谓语动词。题中考查不定式的时态,根据语境:已经成为一个巨大的挑战。故用不定式的完成时。选C。
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