Can the scientist ______ [iks'plein] the reasons for changing the plan?
#38183
A
explain
B
experience
C
explore
D
expensive
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词义替换Maria is good at playing basketball. 
#43380
A
is good for
B
does well in
C
has a good time
D
likes
Mary _____ six dollars for the pen.
#44071
A
spent
B
paid
C
cost
D
took