People cut down too many trees, _____ the greenhouse effect becomes more and more serious.
| A．so | B．because | C．although | D．if |
-----Could I borrow your camera?
------________，but please give it back by Saturday.
A.I am sorry
B. Of course
C. Certainly not
I’m looking for the watch _______ I bought yesterday.
A. which B. who C. whose
------May I take some pictures here?
------Sorry, you mustn’t. Please look at the sign. It says“”.
A. NO PHOTOS
B. NO TALKING
C. DANGER
------When did you have your school trip?
------________.
A.In five days
B. For five days
C. Five days ago
Would you mind _________ basketball here?
A. playing B. to play C. play