Scientists have created GM tomatoes which ______ fresh for 45 days, three times as long as normal tomatoes.
#101941
A
are stayed
B
have been stayed
C
stay
D
stayed
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By the end of last year, another new gymnasium________ in London. 
#99201
A
have been completed
B
were completed
C
had been completed
D
was completed
The way of life he was used to _______ when he came to study in America. 
#101025
A
change
B
changed
C
changing
D
being changed