题目内容

Soon she __________ swim a quarter of a mile.
A．canB．couldC．is able toD．will be able to
D

试题分析：can能，能够；could， can的过去式；is able to能够；will be able to能够。句意：不就她就能游四分之一公里了。结合语境可知本句描述的是将来的动作，故用一般将来时态，选D。
点评：英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型，首先要注意句子中的时间状语，如果没有则要通过分析上下文，结合语境来判断句子的时态。英语疑问句中一般具有时态上的对应关系，注意结合这一特点进行区分。
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