(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

The number of the employees has grown from 1,000 to 1,200.This means it has risen ________ 20 percent.

(2013·新课标Ⅰ，34)It was a real race________time to get the project done.Luckily，we made it.

(2013·福州质检)Many great artists were not famous in their own time，and people only started to ________ them many years later.

(2013·厦门一中高三模拟)—Do you know why the teacher asks for me?
—He wants you to ________ your absence last night.

(2013·合肥二模)When the book，Twilight，was first ________，it was immediately well received by readers.

(2013·河北三校联合模拟)I didn't want to drive all the way to New York by myself，so I ________ Anna，my best friend of ten years，to ride with me.

(2013·南昌一中月考)Thousands of visitors were ________ to the Xi'an International Horticultural Exposition the day it opened.

—Have you ________ some new ideas?
—Yeah.I'll tell you later.

Kelly gave me a vivid ________ of her trip to Mount Tai after her return.