The thought of going back home was ___kept him happy while he was working abroad．

I would rather _____ a little earlier to avoid ______ in the rush hour traffic. [ ]

To Chinese students who are learning English, more attention must_______ grammar.

Would you like to go on a trip with us— I’d love to, _______ I have too much work to do this weekend.

He made a fire ______ himself _____ warm.