_____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
Christmas is _______ special holiday when _______ whole family are supposed to get together.
| A．the;the | B．a;a | C．the;a | D．a;the |
There is an old proverb,"Love me,love my dog."But there iswisdom in this:"Love me,love my book."
| A． | some | B． | much |
| C． | more | D． | most |
"Thingsnever come again!"I couldn't help talking to myself.
| A． | lost | B． | losing |
| C． | to lose | D． | have lost |
Most birds find it safe to sleep in the trees,butthey have eggs or young chicks,they don't use a nest.
| A． | why | B． | how |
| C． | unless | D． | where |
By serving others,a person focuses on someone other than himself or herself,_______can be very eye-opening and rewarding.
| A．who | B．which |
| C．what | D．that |