They usually spend two hours _______ their homework every day.A. do B doing C to do
The radio says that a terrible traffic accident happened sometime ________ 8 a.m. ________ 10 a.m. this morning.
He made a mistake, but then he took action to change the situation ________ it got worse.
Having ________ exercise every day will do great good to your health.
— I’m new in Wuxi. — Take a map of Wuxi with you. You’ll find it of great ________ in helping you to get round Wuxi.
Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerous.