Question

Not only John and Tom but also their sister, Mary, _______ great interest in the piano lessons.

A．take

B．takes

C．have taken

D．had taken

Answer 1

B

考察主谓一致。Not only…but also…做主语时，谓语动词后后一个保持一致。故本题与their sister Mary保持一致，用单数形式，本题又是一般现在时，故B正确。