下列字母书写格式正确的是 ____。
#16885
A
B
C
D
推荐题目
__runs the fastest in the world.
#17091
A
The cheetah
B
The white shark
C
The tiger
D
The manatee
The old lady didn’t know         when the house caught fire.
#17205
A
how to do
B
how to do with it
C
what to do
D
what to do it
_______ 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