问题补充:
There was nothing they could do.
A. but wait
B. except waiting
C. only to wait
D. unless they waited
答案:
(答案→)A. but wait
B. except waiting
C. only to wait
D. unless they waited
解析: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。