1. [单选题]30． Which is the best title for the passage?
A. The Desert Problem
B. People Make Deserts
C. Green Plants and Grass
D. The Desert，the Tree and the Water
2. [单选题]ALight and shadow are friends． They usually go together． We receive light every day． At the same time，we produce shadow．
A. Your body stops it from passing． There is 'a dark spot on the ground next to you． The light cannot reach the dark spot． This is your shadow．
B. Your body stops very little light from reaching the ground． So your shadow is quite short．
C. Its light moves over more of your body．Then your shadow is quite long． Your body keeps a lot of light from reaching the ground．
D. Without sunlight，life on the earth is impossible．Most of us like to stand in the shadow of a tree in summer． But some people are afraid of their own shadow at night． They do not want to walk in a dark street． They do not want to see the shad-ow，either． But still light and shadow usually go together．
E. The sentence "Light and shadow are friends． " means ________ ．
F. the shadow produce light
G. the light usually follows the shadow
H. they usually get on well with each other
I. They are always together，when we get light，we can get shadow．
3. [单选题]贵港素有“荷城”之称，每年夏天在荷塘边都会闻到荷花的香味，这一现象说明（ ）
A. 分子在不断运动 B．分子很小
B. 分子之间有空隙 D．分子可分成原子
