选词填空(可变换形式)

【小题1】He is ________ the cleverest student I’ve ever taught.
【小题2】_______________ emergency, break the glass and press the button.
【小题3】According to some philosophers, everything ________ is reasonable.
【小题4】A great change has ________ in young people’s attitudes to their parents.
【小题5】To be frank with you, the population in our country is ________.
【小题6】Though they graduated from the university ten years ago, all the classmates try to ________ one another.
【小题7】The plan has already been ________ and could be put into operation at once.
【小题8】If the mother does not ________ her child’s signals, her child will make little effort to speak.