下列各句中，加点的成语使用恰当的一项是（ ）

I think he is a student, ____

Will you take part in Mary’s birthday party— I’v no idea. But if Lucy doesn’t go there, _________.

They were determined to carry out the plan at first, but then we____ persuade them to changetheir minds.[ ]

_____ you were so late this morning?— I forgot to set the alarm before going to bed last night. [ ]