中国中铁一局专家型工人窦铁成说:“在外施工,我们代表企业、代表中国中铁一局。在外国人面前,我们代表中国,要努力把工作做好,维护国家的形象。”窦铁成是这样说的,也是这样做的。这表明窦铁成( )①能自觉维护国家的荣誉和利益;②积极承担了对国家应尽的责任;③表现出了对祖国的高度责任感;④总是能够与国家共渡难关;
As we know, ________ is good exercise and it is necessary for health. A. walk B. walks C. walking
—Must I finish my homework before I go home? —No, you ________. But you ________ finish it before tomorrow. A.mustn’t, must B. needn’t, must C. needn’t, mustn’t
—Must we keep the window________ all the time? —No, you don’t have to. A. open B. opened C. Opening
James is _______ boy. A. a 18-month-old B. an 18-months-old C. an 18-month-old
Germs are very small. They can ________ the human body ________ the skin. A. get up, across B. get into, through C. get into, across