Having noticed that she was followed by someone, she stopped and looked at the shop window, _____to be enjoying the beautiful clothes. [ ]

Larry asked Bill and Peter to go on a picnic with him, but ________ of them wanted to, because they had work to do.

下列句中“所以”的用法与其他三项不相同的一项是（ ）

rgot your purse when you went out——Good heavens, _________

You____Tom at the party yesterday;he went abroad for a holiday last week.