C.crying 作伴随状语,因为是主动去哭,所以用现在分词.
C.it difficult find+it+adj.是固定搭配.it作形式宾语
C.made up of 由.组成.因为是被组成,所以用过去分词
C.surrounding 因为是主动围绕,所以用现在分词
B.since 自从.以后
C.As long as 只要.
C.crying 作伴随状语,因为是主动去哭,所以用现在分词.
C.it difficult find+it+adj.是固定搭配.it作形式宾语
C.made up of 由.组成.因为是被组成,所以用过去分词
C.surrounding 因为是主动围绕,所以用现在分词
B.since 自从.以后
C.As long as 只要.