Experts say walking is one of the best ways for a person to _____ healthy.
#81811
A
preserve
B
stay
C
maintain
D
reserve
推荐题目
When a new disease breaks out, experts must ________ what to do in the fastest way.
#69929
A
figure out
B
take out
C
pick out
D
sort out
What terrible weather! It_____heavily for as long as eight hours.
#75350
A
snows
B
snowed
C
is snowing
D
has been snowing
At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
#68142
A
confused
B
puzzled
C
disturbed
D
troubled
We couldn’t understand: what could ______ his sudden change of mind?
#66037
A
enjoy
B
explain
C
accept
D
mean