43[单选题,1.3分] New books were displayed in a ______ position on tables at the front of the shop.

36[单选题,1.3分] In the last twenty years, breakthroughs in technology have _____ advanced the way we communicate, bringing us computers, cell phones and the Internet.

31[单选题,1.3分] In the middle of these otherwise _____ plains is a striking range of mountains.

16[单选题,1.3分] If the market is left ____________, there will sometimes be shortages or over-production.

15[单选题,1.3分] The product must be priced ________ it competes effectively with rival products in the same market.

2[单选题,1.3分] Though she _____ and pleaded, he refused to go to the dance.

[单选题,1.3分] Don’t go to _____ places where there is no fresh air.

[单选题,1.3分] The classroom is almost empty, where is _____?

[单选题,1.3分] —Does Liu Hui serve in the army? —No, but he ________ in the army for three years.

【单选题】They do it _ the knowledge or help of their partents.

_ yourself or no one else will.

______no air or water, there would be no life in the world.