．You ________things about. Look! What a mess in your room!
| A．always throw | B．have always thrown |
| C．are always throwing | D．have always been throwing |
You may________it that he will turn up in time.
| A．decide on | B．depend on |
| C．answer for | D．make sure |
The old man told me that this kind of plant didn’t need________．
| A．to water | B．water |
| C．watered | D．to be watered |
She has been warning________the danger of driving the car________a high speed.
| A．against；at | B．against；with |
| C．of；at | D．of；with |
________about Jane，the teacher called her parents to find out why she was often absent from school.
| A．Concerning | B．Concerned |
| C．To be concerned | D．Concern |
As modern equipment is being used widely，the factory________some of its workers with robots.
| A．represents | B．replaces |
| C．exchanges | D．reduces |