Now that you me________ it, I do remember seeing such a man.
A. men
B. mention
C. mental
D. menu
查看答案
所有的肽和蛋白质都能和硫酸铜的碱性溶液发生双缩尿反应
A. 对
B. 错
He saw it as his d ________ to help the poor.
A. duty
B. dress
C. done
D. dry
Try to s________ every opportunity to practice English.
A. search
B. see
C. seek
D. son
For most students, studying a is a ________ wonderful experience.
A. along
B. alone
C. always
D. abroad