It's hard for us to say goodbye ______ we have so many happy days to remember.

1. It's hard for us to say goodbye ______ we have so many happy days to remember.

A. so B. because C. although D. until

【考点】

表因果关系的连词; 连词辨析;

【答案】

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单选题普通

1. The doctors worked for ten hours, ___________nobody took a break.

A. so B. for C. but D. or

单选题容易

2. The fridge is environmentally friendly __________ it uses less electricity.

A. because B. until C. before D. though

单选题容易

3. ______ the dinner was all over, everyone helped wash the dishes.

A. How B. When C. Before D. Why

单选题容易