(2013·西安一中期末)Is he the only one of the students who ________ here just now?

下列句子中对“之”意思的判断准确的是（ ）①悟已往之不谏。 ②悦亲戚之情话。③其翼若垂天之云 ④覆杯水于坳堂之上⑤脱然有怀，求之靡途。 ⑥之二虫又何如⑦且夫水之积也不厚，则其负大舟也无力。 ⑧奚以之九万里而南为⑨则芥为之舟 ⑩尝与人佣耕，辍耕之垄上

The shirt is so expensiveCan you reduce the price ________a third?

Jack fell off the ladder yesterday, but he is all right now—What a lucky dog! He _________ himself badly

What is the boy doing—It’s not necessary for you to be ________ about others’ business.