Question

There was nothing they could do______.

A．but wait	B．except waiting
C．only to wait	D．unless they waited

Answer 1

A

考查固定短语be nothing but。当but做除了的意思讲的时候，要遵循“有do无to，无do加to”的原则， but前出现了do,but后的to就要省略。故选A。