The traffic rule says young children under the age of four and less than 40 pounds must be in a child safety seat．
| A．being weighed | B．weighed | C．weighing | D．to weigh |
_____H7N9 is a deadly virus, it is still safe to eat thoroughly-cooked chicken.
| A．Until | B．While | C．If | D．Since |
The house is dirty because itsince they moved out.
| A．doesn’t clean | B．isn’t cleaned | C．hasn’t cleaned | D．hasn’t been cleaned |
With hundreds of attractions, Beijing is a city _____ makes a lasting impression on itsvisitors.
| A．which | B．where | C．what | D．when |
—Hurry up! Can’t you drive faster ，Jack?
——No. If I got _____speeding ticket ，my dad would take away my car.
| A．other | B．the other | C．each other | D．another |
A hearty laugh relieves physical tension, _____your muscles relaxed for over half an hour.
| A．to leave | B．left | C．leaving | D．leave |