He was busy with his essay at that time. Otherwise he____ over to help us.

________by the rising price of gas, many car owners use their cars less frequently [ ]

依次填入下面一段文字横线处的语句，衔接最恰当的语序是（3分）粘在铜胎上的图画全是线条画，而且一般是繁笔，没有疏疏朗朗只用少数几笔的。这里头有道理可说。 。 。 。 。还有，一件器物的表面要经过几道打磨的手续，打磨的时候着力重，容易使色料剥落。现在在表面粘上繁笔的铜丝图画，实际上就是把表面分成无数小块，小块面积小，无论热胀冷缩都比较细微，又比较禁得起外力，因而就不至于破裂、剥落。①其次，景泰蓝内里是铜胎，表面是涂上的色料，铜胎和色料，膨胀率不相同 ②景泰蓝要涂上色料，铜丝粘在上面，涂色料就有了界限 ③譬如柳条上的每片叶子由两条铜丝构成，绿色料就可以填在两条铜丝中间，不至于溢出来 ④要是色料的面积占得宽，烧过以后冷却的时候就会裂

You’d better put on a heavy coat.Sometimes it________be very cold here at night.

Please be________. There’s an important meeting in the next room.