5. I want to put you on a very________(严肃)subject. 5____________
4. As everyone knows, he is a________(世界著名)expert on DNA. 4____________
3. They had the building________(重建) after the fire. 3.____________
2. The________(形势) both at home and abroad is excellent. 2____________
1. In summer, a sudden change in t_____(温度) could bring rain. 1____________
6.disaster 7.celebrate 8.strait 9.torn 10. historic
10. Please remember the ______(历史) moment, when Lianzhan came back to mainland after 60 years. 10.________
Keys: 1. graduation 2.discovered 3.thoughts 4.cure 5.shocked
9. The old houses have been t________ down. 9.____________
8. The Chinese mainland is separated from Taiwan by the Taiwan s________.8____________
7. On Oct 1st, we warmly c________ our National Day every year. 7____________