[多选题]有抗化学侵蚀要求的混凝土多使用（ ）。
A.硅酸盐水泥
B.普通硅酸盐水泥
C.矿渣硅酸盐水泥
D.火山灰质硅酸盐水泥
E.粉煤灰硅酸盐水泥

阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。
From Monday until Friday (36) people are busy working or studying, but in the evenings and (37) weekends they are free to enjoy themselves. Some watch TV or go to the movies; (38) take part in sports. It depends on individual (39) . There are many different ways to spend our (40) time.
(41) . everyone has some kind of hobby. It may be (42) from collecting stamps to (43) model planes. Some hobbies are very (44) ; others don’t cost (45) at all. Some collections (收藏品) are (46) a lot of money; others are valuable only (47) their owners.
I know a man who (48) a coin collection worth thousands of dollars. A short time ago, he got a (49) fifty cent piece by (50) $250. He was very happy about his collection and thought the price was (51) . On the contrary, my youngest brother (52) match boxes.
A. of 
B. for 
C. with 
D. at

Demands for stronger protection for wildlife in Britain sometimes hide the fact that similar needs are felt in the rest of Europe.
Studies by the Council of Europe, of which 21 countries are members, have shown that 45 percent of rep-tile (爬行动物) species and 24 percent of butterflies are in danger of dying out.
European concern for wildlife was outlined by Dr. Peter Baum, an expert in the Environment and Nature Resources Division of the Council, when he spoke at a conference arranged by the administrators (管理人员) of a British national park. The park is one of the few areas in Europe to hold the Council’s diploma for nature reserves of the highest quality, and Dr. Baum had come to present it to the park once again. He was afraid the public opinion was turning against national parks, and that those set up in the 1960s and 1970s could not be set up today. But Dr. Baum clearly remained a stronger supporter of the view that natural environments needed to be
A. it is only in Britain that wildlife needs more protection
B. many species of wildlife in Europe are in danger of dying out
C. there are fewer species of reptiles and butterflies in Europe than elsewhere
D. certain species of reptiles and butterflies in Europe need protection