Planes will be very large______ flying will be very cheap.
| A．because | B．so | C．but | D．and |
-----It’s an exciting film. I’ve just seen it. -------------_____________.
| A．So do I | B．So I do | C．So have I | D．So Ihave |
We must keep the classroom ___________.
| A．clean | B．to clean | C．cleaning | D．cleaned |
----- Can you ride a horse?
--------No, I ________.
| A．needn’t | B．may not | C．can’t | D．mustn’t |
Trees __________every year to make our city greener.
| A．plant | B．are planted | C．were planted | D．will be planted |
-----Do you know the man ________ is reading the book over there?
--------- Yes, he is Mr. Green, our P.E. teacher.
| A．which | B．what | C．whom | D．who |