Do you have any idea why Mark is leaving?—- No. In fact, everyone is ________about it．

Last summer holiday, I went back to my hometown, _____ the neighbours and the house _____ I used to be familiar with were gone. [ ]

______ on the top of the tower, and you can see the whole city.

Hou Yi was ______ sad _______ he called out Chang’e’s name to the moon every night.

ren are excited about the approach of Christmas, may bring great happiness to them.