题目

单词拼写（共10小题，每小题1分，满分10分） He c_________ that we should come back before 9 o’clock. An e___________ is a kind of machine for raising and lowering something. If you want to read quickly and well, you should enlarge your v__________. People aged from 13 to 19 are called t__________. His friend has _________(遭受) from lung cancer for some years. They carried out a s_________ of experiments to test the new drug. The mother________(使平静) the little boy by telling him a story. I’m rather _________(挂念的) about your health. He made a long j_________ 请从下面五种物质中选择恰当物质，将其字母代码填入下题的横线中． A食盐；B熟石灰；C稀盐酸；D碳酸氢钠；E明矾．请据此回答（填字母）．（1）常用于改良酸性土壤；（2）可用于金属除锈的是；（3）常用于食品调味的是；（4）可用于治疗胃酸过多的是；（5）常用作净水剂的是 ．