Someofyoumayhavefinishedunitone._____,youcangoontounittwo.
A.Ifyoumay
B.Ifyoudo
C.Ifnot
D.Ifso
正确答案:D
上一篇 The house I grew up ________ has been taken down and replaced by an office building. A
下一篇 According to statistics, a man is more than twice as likely to die of skin cancer ____