Ⅰ. 选用合适的关系词填空
1. Is this the house _________ you were born in thirty years ago?
2. That ginkgo tree(银杏树), _________ branches are almost bare, is very old.
3. The opera singers are taking a break on the subway train, _________ they are giving an attractive performance.
4. They spent last summer holiday in Guangzhou, _________ they learnt a lot.
5. Israeli(以色列的)air force held air show the other day, _________ was wonderful.
6. He didn’t give us the reason _________ he was absent from the meeting.
