China made a commitment to the world in the Copenhagen Summit that by 2020, the carbon-intensity of its economy ______ fall 40% to 45%.
A. shall B. may C. must D. should
--- I am really struck by your spoken English. You speak so fluently. Have you been abroad?
---Yes. I ______ in London for two years.
A. have stayed B. stayed
C. had stayed D. have been staying
Look, _______ fashionable clothes is he wearing that all the eyes are fixed on him!
A. so B. what C. how D. such
He got into the old truck and off ______ to one of the far corners of the farm to fix the fences.
A. did they rush B. they did rush
C. they rushed D. rushed they
I’m going to spend the summer vacation in Shanghai, _______ lives my grandmother and some other close relatives.
A. which B. when C. that D. where
________ on their last legs, the enemies still thought they were unconquerable.
A. As though B. Even though
C. In case D. As soon as
