﹣The air here is much fresher than before．
﹣Exactly! We a lot of trees in the past few years．（ ）
A．plantedB．were planting
C．have plantedD．will plant
Do you know _____?
In Stratford， England．（ ）
A．where Shakespeare was born
B．when Shakespeare finished school
C．how many plays Shakespeare wrote
D．why Shakespeare's works are popular
Have scientists found life on Mars？
Not yet， but I think they ______ it some day．（ ）
A．findB．foundC．have foundD．will find
Can you play volleyball or basketball？
_______ of them． I'm good at ball games．（ ）
A．BothB．EitherC．NeitherD．None
Little Mary says good night to her parents ________ she goes to bed every day．（ ）
A．ifB．untilC．beforeD．unless
How often do you go to the cinema？
______．I only watch movies at home．（ ）
A．AlwaysB．UsuallyC．SometimesD．Never