My uncle _____ in Taiwan for 20 years. Now he has settled down in mainland.
#102308
A
lived
B
had lived
C
has lived
D
was living
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When you don’t know a word, you can _________ in the dictionary. 
#99231
A
look it up
B
set it up
C
give it up
D
pick it up
They _____ on the program for almost one week before I joined them, and now we _____ it as no good results have come out.
#101978
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working
Experiments of this kind ___in both the U.S and Europe well before the Second World War
#100340
A
had conducted
B
have conducted
C
have been conducted
D
had been conducted