21.This university has———— a great deal since our last visit

21.This university has———— a great deal since our last visit.
A.appeared B.altered C.approached D.admired
22.She is narrow-minded and always ————what other people have.
A.jealous B.owes C.misses D.envies
23.When he woke up from his dream,the frightened boy tried hard to _______ his mother's
arm.
A.grape B.gray C.grip D.grave
24.Mary has never been a ship.
A.abroad B.aboard C.above D.absorb
25.The lens of modern cameras may be coated with more than ten ———— of protection.
A.levels B.stories C.layers D.formations

21.B.altered 意思是：变化
22.D.jealous 意思是：嫉妒的,应加介词,envy：嫉妒,动词
23.C.grip 意思是：抓住 ,紧握
24.B.aboard 意思是：上船
25.C.layers意思是：层,意思是镜头会涂上多层保护物质