四方上下为宇，古往今来为宙。

选择填空（注意单、复数）：
1 The universe is ____________.
A. sun and moon   B. time  C. space and time D. space
2 We can see______ in the sky at night. A. star B.sun C.earth D. moon
3 The______rises in the east. A. star B.sun C.earth D. moon
4 The ______ goes round the _______. A. star B.sun C.earth D. the moon
5 There are nines ______ around the sun. A. star B.sun C.planet D. moon