7. He is able to lift __________ of two hundred jin.
A. weigh
B. weights
C. a weight
D. weighty
8. Scientists generally agree that Earth's climate will warm up over the next 50 to 100 years __________ it has warmed in the 20,000 years since Ice Age. A. as long as B. as much as
C. as soon as
D. as well as
9. Elephants have their own way to tell the shape of an object and _________ it is rough or smooth.
A. 不填
B. whether
C. how
D. what
10. _______________________ ,! have to put it away and focus my attention on study this week.
A. However the story is amusing
B. No matter amusing the story is
C. However amusing the story is
D. No matter how the story is amusing
11.Once a decision has been made, all of us should _________ it.
A. direct to
B. stick to
C. lead to
D. refer to
12.Jumping out of_________ airplane at ten thousand feet is quite _________ exciting experience.
A. x; the
B. x; an
C. an; an
D. the; the
13. —Let's go and have a good drink tonight.