We’ll leave for senior high schools soon. It’s really difficult _______ goodbye to our teachers and friends.
We’re heard much _______ about the missing plane, but we still don’t know where it is.
________ came to my house just now because there was a box of fruit in the doorway(门口).
To make her son enter a key high school, the mother is very strict ______ him.
---Oh, it tastes quite good. May I have _________ cup of coffee? ---OK. Here you are.
Edward doesn’t like his car. He thinks ________ is more modern than his.