We didn’t know you were in trouble at that time, otherwise we________ you a hand.[ ]

I don’t remember _______ the book yesterday.

下列语句中加线词语的解释不正确的一项是（）

If you can’t understand these sentences, your constant lack of handing in homework ____

A makes a lot of excuses inan attempt to make war on Iran , however, Its __________ purpose lies in theabundant oil there.