----Have the Smiths moved to California?
-----Not yet, but they have ____________.
A．decided toB．decided itC．decidedD．decided to move
A

試題分析：考查不定式的省略。不定式的省略通常都只保留不定式符號to,把后面的內(nèi)容都省略。句意：—斯密斯先生一家搬去加利福尼亞了嗎？—還沒有，但是他們已經(jīng)決定搬過去了。本題省略了move to California.故A正確。
點評：不定式的省略通常都只保留不定式符號to,把后面的內(nèi)容都省略。只有在不定式符號to后面接be或者h(yuǎn)ave的時候，保留be和have.
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