It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
| A．symptom | B．shadow | C．treatment | D．convenience |
The traffic rule says young children under the age of four andless than 40 pounds must be in a child safety seat.
| A． | being weighed | B． | to weigh | C． | weighed | D． | weighing |
Wind power is an ancient source of energywe may return in the near future.
| A． | on which | B． | by which | C． | to which | D． | from which |
It took us quite a long time to get to the amusement park. It wasjourney.
| A． | three hour | B． | a three-hours | C． | a three-hour | D． | three hours |
___________ our manage objects to Tom's joining the club, we shall accept him as a member.
| A．Until | B．Unless | C．If | D．After |
When changing lanes, a driver should use his turning signal to let other drivers know ______.
| A．he is entering which lane | B．which lane he is entering |
| C．is he entering which lane | D．which lane is he entering |