---ThestudentsofGrade9inChangchunhavetotakepartintheP．E...

問題詳情：

---The students of Grade 9 in Changchun have to take part in the P．E．test from 2016．

---Yes．________ you want to pass it and be stronger，practice more．

A．until    B．if   C．unless D．or

【回答】

B

知識點：連詞

題型：選擇題