It may be five to ten years ______ we can test this medicine on human patients.
A. since
B. after
C. before
D. when
查看答案
Thirty minutes ______ the limit of this interview.
A. are
B. have been
C. is
D. has been
We were all excited at the news ______ our annual sales had more than doubled.
A. which
B. that
C. whether
D. what
Until the late 1880s, magazines were only for the rich, who could ______ both the time and money to read them.
A. offer
B. afford
C. effort
D. affect
"I see the cultural messaging everywhere that says that an ______ life is a meaningless life."
A. necessary
B. primary
C. ordinary
D. extraordinay