问题
选择题
In his book,he explains both ______ it means to be a scientist and ______ science works.
A．how; how
B．what; that
C．what; how
D．how; that
答案
答案：C
考查名词性从句。句意：在他的书里，他即解释了科学家的意义又说明了科学是如何的运作的。前空为意味作----，what的含义；后空work为不及物动词，故用how.