选用because或because of填空。1. _____ his bad le

题目内容：

选用because或because of填空。

1. _____ his bad leg, he couldn't walk so fast as others.

2. They didn't go swimming _____it was raining hard.

3. —Why can't you do it now?

—_____I'm too busy.

4. He didn't come today _____his illness.

最佳答案：

1. Because of 2. because 3. Because 4. because of

答案解析：

该题暂无解析

考点核心：

根据最新人教版版和牛津版的初中英语教材的词汇量，一个水平较高的初中毕业生的词汇量应在2400左右。初中的单词和词组词汇量要求数量会不断增长。