中国自行研制的第一颗氢弹爆炸成功时间是______年。
A.1964
B.1965
C.1966
D.1967
参考答案:D
One Sunday morning, Li Ming and his grandpa are 1.
feeding the bird in the cage. The bird was unhappy 2.
because it had enough food and water. Li Ming.did not 3.
know why not. The next morning on his way to school, 4.
Li Ming saw some birds flew in the sky. Then he thought 5.
about the lonely bird in the cage. He decided to persuade his 6.
grandpa to set the bird free. When he got to home, he said 7.
to his Grandpa,“Birds also need friends!” To his delighted , his 8.
grandpa agreed.The bird set free. Grandpa and the children 9.
were very happy to see the bird flying away in the sky. 10.