I think it’s impolite to keep others ______.
A. wait B. to wait C. waits D. waiting
We used to ____ to school, but we get used to _____ to school now.
A. walk, take a bus B. walk, riding a bike C. walk, ride a bike D. walked, took a bus
Put on your coat. Don’t ______.
A. take them off B. take it off C. take off them D. take off it
This book is worth _____.
A. read B. to read C. reading D. reads
– Would you mind _____ in the bus? - Of course not.
A. not to smoke B. not smoking C. smoke D. not smoke
Water is important to us. We can’t live _____ it.
A. except B. with C. besides D. without
