__________!There is a train coming.[ ]

He walked down the hills, and ________ softly to himself

填入横线上的句子，与上文衔接最恰当的一句是（ ）随着市场经济体制的日臻完善，利用先进技术提高产品的科技含量以增强市场竞争力，已成为各企业集团的共识。_________________________________________ 。

Do you have________ to say about your study

We most prefer to say yes to the ______ of someone we know and like.