The man stopped from time to time_______whether he was being followed.
| A．as if found | B．as to find | C．as if to find | D．when found |
I want to know all negative effects the Internet our lives.
| A．has in | B．have in | C．has on | D．have on |
We are taught that business letters should be written in a formal style in a personal one.
| A．rather than | B．other than | C．better than | D．less than |
Eating too much fat can heart disease and cause high blood pressure.
| A．result from | B．contribute to | C．distribute to | D．devote to |
All of the things there are inexpensive, with prices from $1 to $10.
| A．ranging | B．decreasing | C．possessing | D．spreading |
They have produced they did last year.
| A．twice more grain as | B．twice as much grain as |
| C．twice as many grain as | D．as twice many grain as |