单选题 We have to subject the redesigned car seat to the test to officially confirm that it is ______ strong.
A. sufficient
B. sufficiently
C. more sufficient
D. most sufficient

【正确答案】 B

【答案解析】初级问题看到be动词后面的表语strong，就知道这里应该填入副词。正确答案是B选项。 sufficiently strong意为“足够强壮的”；car seat有时特指(汽车内的)儿童座椅，有时也指一般车内座椅。