7. We will not attack ______ we are attacked; if attacked,we will certainly counter-attack.
A. if B. when C. unless D. even if
8. You can take ______ seat you like.
A. no matter what B. no matter which C. what D. whichever
9. I ______ to speak to you all these days.
A. wanted B. have wanted C. shall want D. shall be wanting
10.A burning cigarette he threw into the wastepaper basket ______ fire to the hotel.
A. made B. set C. caused D. caught
11."Do you hear someone knocking at the door?"
"Yes, I did. I heard him ______ three times."
A. knocking B. knocked C. being knocking D. knock
12.Peter, John and Tom each ______.
A. say they came first B. says they came first
C. says he came first D. say came first
13.Through long power lines electricity goes ______.
A. to the place needed B. there it is needed
C. where it is needed D. which it is needed
14. ______ from the apple tree.