----Have the Smiths moved to California?
-----Not yet, but they have .
A. decided to
B. decided it
C. decided
D. decided to move
网友回答
(答案→)A. decided to
B. decided it
C. decided
D. decided to move
解析：考查不定式的省略。不定式的省略通常都只保留不定式符号to,把后面的内容都省略。句意：—斯密斯先生一家搬去加利福尼亚了吗？—还没有，但是他们已经决定搬过去了。本题省略了move to California.故A正确。