As you know, it is our duty to _________ my younger sisters from being hurt when they are in trouble.
| A．prevent | B．save | C．stop | D．protect |
____________ production up by 60%, the company has had another excellent year.
| A． As | B．For | C．With | D．Through |
The home improvements have taken what little there is _________my spare time.
| A． from | B．in | C．of | D．at |
Shortly after the accident, two ________ police were sent to the sport to keep order .
| A． dozens of | B．dozens | C．dozen | D．dozen of |
The number of people invited __________ fifty, but a number of them __________ absent for different reasons.
| A． were ; was | B．was ; was | C．was ; were | D．were ; were |
____________ people in the world are sending information by E-mail every day.
| A．Several million | B．Many millions | C．Several millions | D．Many million |