Question

【题目】The boy is only five years old, but he ________ play the piano well.

A. able B. is able

C. be able to D. is able to

Answer 1

【答案】D

【解析】

句意：那个男孩只有五岁，但是他能弹钢琴弹得非常好。

able有能力的，be able to能，此处作谓语，故用be able to，主语he是第三人称单数，故谓语用第三人称单数，故为is able to，故选D。