The boy burst into tears ________ he saw his mother

Do you have a knife—Yes, I do. I have a big .

What will they do to deal with the accident — Ten doctors and five nurses havea medical team and will start out right now.

____ you are here, I suggest that you devote yourselfentirely to your studies[ ]

下列各句加点字活用现象分类正确的一项是（ ）①既来之，则安之②填然鼓之③是使民养生丧死无憾也④树之以桑⑤与少乐乐⑥使人先表澭水⑦赤也为之小