Her latest novel is quite ___________ ( 与 ..... 不同 ) her earlier works. 2. The heating __________ ( 系统 ) in the hotel has an automatic( 自动的 ) temperature control. 3. The ________ ( 难题 ) is how we can get a return ticket in this tourist season. 4. While jokes are likely to contribute to a pleasant _________ ( 气氛 ) ,you’ve got to be careful not to hurt others. 5. --Why was Professor Smith unhappy recently? --Because the _______( 理论 ) he stuck to proved wrong. 6. Some experts think reading is the ______ ( 基本的 ) skill upon which school education depends. 7. The boy likes studying the universe and he wants to choose ________( 天文学 ) as his major. 8. There is too much _________ (violent) in the media, which has a bad effect on teenagers. 9. The study shows that the violent scenes in movies and TV are harmful _______ children. 10. The woman who gave birth _______ the twins last week turned out to be a film star. 11. Social attention should be paid to preventing our earth from ____________ (pollute). 12. Don’t worry.I’m sure things will get better _______ time. 13. The earth is a rocky planet where there is liquid water,which is necessary for life ____(exist). 14. The bus driver asked the passengers to get on the bus ________ turn. 15. The naughty boy ______ (lie) to me that the hen had _______(lay) three eggs the day before.