The invention of artificial hearts marked a turning point in the battle heart disease.
#27040
A
among
B
for
C
against
D
between
推荐题目
I’ll get Bill to accompany me the piano when I sing a song at the concert.
#26782
A
at
B
with .
C
to
D
by
The discovery of these tombs is _______ for scholars’ studying the history of the Tang Dynasty.
#27491
A
of very important
B
great importance
C
of great significance
D
great significant
—What a pity that he missed his final shot and ended in a tie!—Yes, but he didn't lose it ________！ It just wasn't his day.
#25369
A
for fun
B
in preparation
C
on purpose
D
after all