If l don't know if l will know anyone at the party this evening.If you ____ anyone,you won't stay

问题描述:

If l don't know if l will know anyone at the party this evening.If you ____ anyone,you won't stay
for a long time will you?A.won't know B.don't konw C.know D.will know
为什么

B,这是条件从句,从句用一般时态什么叫条件从句?条件从句指表示假设的从句