问题

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
B:what; that
C:what; how
D:how; that
正确答案是:
同类题型
_______ he was the last man I wanted to see, I did all that I could to help him
She devoted herself ________to her research and it earned her a good reputation in her field
This test ____ a number of multiple-choicequestions.
. ______ is the kindness of the nurse thatthe patient can never be ______ to her.