风烛残年 故弄炫虚 情郁于中 莫明其妙 无精打采
居理力争 感慨良深 为富不仁 辗转反侧 东挪西借
错别字
____
改 正
—How about a cup of tea?
—__________.
气孔是植物体与外界进行气体交换的“窗口”．气孔的开闭受（ ）控制．
Modern medicine ____ (develop) so quickly recently that many diseases can he cured.
