题目

根据句意,用括号内所给单词的适当形式填空。【1】I don’t think it is important for children to learn English_____________(语法) at first.【2】Don’t be_____________(不耐烦的) with him. After all, he is a child.【3】The ____________(开拓者) in the medical area have left us so much useful knowledge.【4】The teacher ____________(分开) the class into five groups before the game began.下列各项中能正确表示动物与其气体交换部位的有 （ ）①蚯蚓—体壁 ②鲫鱼—鳃 ③家鸽—肺和气囊 ④青蛙—鳃和皮肤 ⑤家兔—肺A. ①②⑤ B. ①②④ C. ①③⑤ D. ②③⑤