用as,since,because(of),for或thanks to填空 1.Miss Gao didn't come to the meeting_____she was ill.2._____you all know,China has hosted the 2008 Olympic Games.3._____everybody makes a mistake,we should give the boy a chance.4.It must have snowed las

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用as,since,because(of),for或thanks to填空 1.Miss Gao didn't come to the meeting_____she was ill.
2._____you all know,China has hosted the 2008 Olympic Games.
3._____everybody makes a mistake,we should give the boy a chance.
4.It must have snowed last night, _____the ground is covered with snow.
5._____your help,we could finish the job on time.
6._____you are so busy,I'll ask Lily to go with me.

1.because 直接因果
2.as
3.since 既定事实,用as 也可以,单语气稍轻
4.for 推断,不能用because代替.
5.thanks to
6.since 既然

1. because 2. As 3. Since 4. for 5. Thanks to 6. Since