问题

The secretary worked late into the night, ______ a long speech for the president.[ ]

A: to prepare
B: preparing
C: prepared
D: was preparing

正确答案是：

同类题型

The volunteers will visit the primary school next Monday ,_______all the students are children of migrant workers,

下列各句中，没有语病的一项是

It was unwise of him to ____ the unreliable data in hisspeech. [ ]

A good idea ________ to me that we could advertise our products on the Internet.

_______he grew older , he began to go deaf