单项选择题

In the preface ________the book, the writer thanked all the people who had helped him.

A．of
B．for
C．in
D．to
<上一题 目录 下一题>
热门 试题

单项选择题
It can be concluded from the passage that the author's attitude toward sex selection is________.
A．negative
B．positive
C．neutral
D．favorable
单项选择题
The gender of the baby is decided by________.
A．the father's DNA
B．the mother's DNA
C．the father's sperm
D．the mother's egg
相关试题