Warm­blooded animals live an active life even in freezing winter,which helps them to ________ their normal body temperature.
#73122
A
keep up
B
build up
C
bring up
D
pick up
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 Mary devoted her life       the sick.
#68321
A
to care for
B
caring for
C
to caring for
D
to have cared for
_____ the watch and see if you can find out what’s wrong with it.
#68031
A
Pack up
B
Break down
C
Dig out
D
Take apart