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完形填空
Fox is an eight-year-old boy. He is a good boy. He does 1__ in all his lessons. He 2__ study and he is always active（活跃）in class. Every time the teacher asks a question, Fox always 3_ his hand quickly. Sometimes his answer is 4__, but the teacher always smiles and says, "Good, Fox. But 5_ a better answer to my question?" One day, the teacher asks the boys and girls a question. "Swallows（燕子）fly to the south  6    winter comes ,"he says. "But why don't cats and dogs do 7__?" Fox lifts （举） his 8__ as usual. "Yes, Fox?" says the teacher   9__ . Fox stands up and says, "__10____ they have no wings (翅膀)."
（   ）1. A. good        B. hard           C. well       D. bad
（   ）2. A. doesn’t like                 B. worries about
C. goes to a                     D. likes
（   ）3. A. gets up       B. puts on      C. gets on      D. puts up
（   ）4. A. right         B. wrong        C. easy         D. hard
（   ）5. A. has           B. is there     C. are there    D. have
（   ）6. A. after         B.before        C.until         D.  and
（   ）7. A. different     B. differently  C. the same     D. with
（   ）8. A. hand          B. head         C. foot         D. eye
（   ）9. A.sad            B. cry          C. happily      D. angrily
（   ）10. A. Why          B. Because      C. That         D. Where