单项选择题
（） all we have learned from space flights, the moon is still a riddle from the distant past.
A.Insteadof B.Inspiteof C.Insearchof D.Becauseof
单项选择题 I was exhausted when I reached home, and I flung myself down on the front steps to （）.
单项选择题 The bees（）out o ftheir hive.
单项选择题 The Chinese nation has （） significantly to the progress of human civilization.
