A:in order to have received
B:in order to receive
C:so as to be received
D:so as to be receiving
齐白石的画大体是某植物和一两只草虫结合在一起,植物用意笔,草虫用工笔,那些莲叶啦,树丛啦, ① ,好像使用大笔饱蘸了墨汁随便挥洒而成;而那些蝉啦,蚌蜢啦,则画得细致极了,那真是 ② 描绘出来的,纤细的触须,虫翅上的脉络,都 ③ 。这两种笔墨结合在一起,彼此衬托, ④ :植物更显得欣欣向荣,草虫更显得 ⑤ 。
目前,综合治理长江的首要任务是( )