问题

They were afraid to complain about the noise ________ they didn’t want to make an enemy of their neighbors.

A:because
B:unless
C:though
D:when;

正确答案是：

同类题型

Jenny, I think I’ll just have some coffee for a change．—______．The coffee I bought yesterday is in the cupboard．

They had kept working for several weeks everything was in order

Tom was _____ to win the first prize in the competition, but his illness made him miss the chance. [ ]

Why weren’t you at the meeting—I ____for a long distance call from my sister in America.

I didn’t really enjoy going out thecrowded streets.