Is this the reason ___________ at the meeting for his carelessness in his work?
| A．he explained | B．what he explained | C．how he explained | D．why he explained |
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 |
Air pollution will get worse and this will do________to people，for example，it can cause cancer.
| A．damage | B．injury |
| C．good | D．harm |
________，she fell to the ground，never to wake up again.
| A．Coldly and hungry | B．Cold and hungry |
| C．Cold and hunger | D．Coldly and hunger |