二．选择正确的答案，将其编号填入括号里。

（    ）1.In Alaska, USA, it ______ a lot.

           A. snow      B. snows      C. snowing      D. to snow

（    ）2. Some kids go to school _______. It’s fast.

           A. on foot         B. by sled     C. by bike         D. by air

（    ）3. We must look ________ before crossing the road.

         A. in front    B. right     C. left    D. first left and then right

（    ）4. Grandpa, let me read this _______ you.

         A.   on       B. at   C. by        D. for

（    ）5. By sled, don’t let the dogs run too ________.

         A. fast    B. slow       C. straight    D. high