问题描述：
初二英语（用“since”和“for”填空）
1.Jim has been sleeping _____ nine o'clock.
2.Lucy has been running _____ half an hour.
3.Sarah has been talking on the phone ______ five minutes.
4.Louis has been studying Chinese ______ he was six years old.
5.I've been practicing the piano _____ half past ten.
1.Jim has been sleeping _____ nine o'clock.
2.Lucy has been running _____ half an hour.
3.Sarah has been talking on the phone ______ five minutes.
4.Louis has been studying Chinese ______ he was six years old.
5.I've been practicing the piano _____ half past ten.
问题解答：
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