Everyone here will thank the firefighters for the things they did to prevent fires ________the environment safer.
A．to make B．make C．making D．from making
She always goes swimming ________cold it is.
A．however B．no matter C．although D．whatever
—We'd like you to start work tomorrow if possible.
—I'm sorry, but I can't possibly start until Monday.________？
A．Do you agree with me B．Is that a good idea
C．Do you think I'm right D．Will that be all right
Look out! The train ________.
A．leaves B．is leaving C．has left D．left
Do you think exercise can keep us ________？
A．well B．good C．fit D．fine
The teacher asked us ________ in our reports before class.
A．hand B．to hands C．handed D．to hand
