The book took ten years of thorough research.

2023-11-03 11:01:22
卫生(C)

The book took ten years of thorough research.

A.basic

B.careful

C.social

D.major

正确答案是B

上一篇：The love of money is the <u>root</u> of all evil.

下一篇：Greene spent a <u>brief</u> time at Cambridge.