题目

One morning, when I was leaving for my business, a middle—aged man came up and asked me for help. He said he had no__________to get food for his large family. “You look__________. Why don’t you work？” I asked. “ Simply because I cannot get work，sir. ” “If I give you work, what you want?” “As long as I can get bread for my family, sir. ” he_________. I decided to find out if he__________meant what he said. OK. I'll give you one pound an hour, if you will__________a brick(砖)under your arm and walk around the square for five hours without stopping. “Thank you, sir. I w若他所观察的某个洋葱表皮细胞在视野的左下方，要使这个细胞位于视野的中央，移动玻片标本的方向是________．