— You should be careful when ________.— Yes, I will. I’d like to know when ________ to have a rest.
Please connect the phone ________ the computer. A at B.into C.with D.in
Why not join an English club to practice ________?
Mr.Brown teaches ________ well ________ everybody likes his lessons.
If you meet some new words, you'd better ________ in a dictionary.
-____you ever ____with a group?-Yes, I have .