6 ________Peter was sleeping; a thief broke into his house.7 It snowed ________ we arrived in Tokyo.8 She left her hometown________ she was five.9 I was studying in the library__________ the UFO landed.10.What were you doing ______ the big earth-quake happened?
问题描述：
6 ________Peter was sleeping; a thief broke into his house.7 It snowed ________ we arrived in Tokyo.8 She left her hometown________ she was five.
9 I was studying in the library__________ the UFO landed.
10.What were you doing ______ the big earth-quake happened?
答
全部都填写when
答
6.while
7.when
8.when
9.when
10.when