用since或for填空.

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/12 23:13:24

用since或for填空.
1、Mike has been sstudying english_he was six years old.
2、i have been watching you_tow minters.
3、i have been parcticing the piano_10:30.

1、Mike has been sstudying english_since he was six years old.
2、i have been watching you_for two minters.
3、i have been parcticing the piano_since 10:30.

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