A series of debates tetween the lectures is scheduled for the next week怎么解释?

A series of debates tetween the lectures is scheduled for the next week怎么解释? 谁知道 A series of debates between the lectures____scheduled for the next weekend.A were B are C have been D was为什么会选D的,.. A series of debates tetween the lectures was scheduled for the next weekA series of debates tetween the lectures （ ）scheduled for the next week.a was b were c have been d are为什么选a?next week 是将来时啊,was 是过去时啊.还有lectur a series of 是a series of factors还是a series of reasons a series of a serious of 区别 the last of a series of competitions a series of ,后面加什么词 a series of books翻译成中文 用a series of造句,急用! set down a series of的意思 a series a series a series a series of和a trail of的区别 a series of后是不是可以跟可数复数名词,也可以跟不可数名词?a series of development a series of books 英语this pulishing house is designing 空school textbooks填of a series of 还是a new series of ,为什么 a series of后 +可数还是不可数啊