Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
#13853
A
carry on
B
feed on
C
put on
D
focus on
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My uncle moved to London ______.
#14531
A
in the fifties
B
in the 1980s
C
in his fifty
D
in 1990s
custom                 
#14161
A
measure
B
upstairs
C
respect
D
sugar