He's been collecting stamps _ he was eight years old.
A. when B. while C.and D. since
-Is your brother running in the park? -No, is swimming in the river.
A.she B.his C.her D.he
Shanghai seems like good place for vacation.
A.a B.an C.the D./
You can't always________ [dɪ'pend]on your parents.
A. decide B. depend C. drive D. develop
We should protect the__________ [ɪn'vaɪrənmənt].
A. environment B. improvement C. encourage D. exoerience
When we are in the library, we should_______ [kiːp] quiet.
A. meet B. keep C. sleep D. feet
