The underlined letter “ a” in the word “______” has a different pronunciation from the others.
#17057
A
math
B
calendar
C
fantastic
D
behave
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__runs the fastest in the world.
#17091
A
The cheetah
B
The white shark
C
The tiger
D
The manatee
选出不同类型的一项。    
#17262
A
pen
B
ruler
C
pencil
D
quilt
_______ provides many hours of air for astronauts in space.
#17237
A
An air tank
B
A power pack
C
A helmet
D
A space sleeping bag