题目内容

wider

A. bigger, broader
B. to be sure of
C. to present two people to each other

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bet

A. main
B. better chance of happening
C. to be sure of

primary

A. to accept something
B. the first thing to do
C. main

more likely

A. better chance of happening
B. to develop, to think of, to create
C. the first thing to do

正面下手发球时，抛球距离最适宜高度是（）。

A. 10CM
B. 20CM
C. 30CM