问题
选择题
25. ---- Ricky, why hasn’t Billy been with us these days?
---- Oh, he is _________for next month’s 400m race.
A．standing out
B．taking up
C．backing out
D．working out
答案
答案：D
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25. ---- Ricky, why hasn’t Billy been with us these days?
---- Oh, he is _________for next month’s 400m race.
A．standing out
B．taking up
C．backing out
D．working out
答案：D