1.【解析】选C。句意:他看到有一股岩浆朝他袭来,要把他团团围住,但他还是及时躲开了。surround“包围;围绕”,符合题意。measure“测量;估量”;float “浮动;(使)漂浮”;crash“碰撞;坠落”。
【变式备选】
①When I got home,I found my son was playing on the carpet,_______ by all kinds of toys.
A.surrounding B.surrounded
C.surrounds D.having surrounded
【解析】选B。由句子结构可知此处应使用非谓语动词,可排除C项。再由my son与surround之间是被动关系可排除A、D两项。此处是过去分词作状语,故选B。