He is such a busy man that it’s hard for him to________ enough time to meet us at the airport.

Three bridges ________ over the river five years ago.

Many world-famous universities names are familiar ____ Chinese students. [ ]

They stay _____home _____Monday _____Wednesday.[ ]

Look! It’s raining heavily. _____ take a raincoat with you? — Well, I’ll take one right now. [ ]