Since the opening and reform policy, China    a boom in its economy.
#102286
A
enjoys
B
has been enjoying
C
enjoyed
D
having enjoyed
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The gasoline       . Let’s fill the car up at the next gas station.
#100795
A
is running out
B
has run out
C
is being run out
D
has been run out
 —Why haven’t you asked her to come here?—She _______ an important experiment when I found her and she _____ it. 
#103052
A
had done ; didn’t finish
B
was doing ; hasn’t finished
C
did ; wouldn’t finish
D
did; hadn’t finished
Mr. Robinson       in China for many years, but now he is in Australia.
#100300
A
has lived
B
had lived
C
lived
D
was living