–It’s really a pity that I didn’t see you in Shanghai. -- I _________ to see you in the hotel, but I was too busy.
It is not right for parents to give ______ their children want.
It is the custom for people to get together on New Year’s Eve, ______ fun with each other.
They are not only a source of ______, but also an important way of learning.
Teachers assign homework for ______ purposes. In some cases, teachers seek to review and solidify materials being covered in class.
-Peter has been eating sweets all day. -No ______ he is not hungry.