Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
#67995
A
when
B
where
C
that
D
which
推荐题目
—How unhappy your roommate looks!—Yes, but he's not willing to tell me what it is _______ is troubling him.
#72642
A
what
B
which
C
as
D
that
I remember _________the factory owed a small workshop and two machines.
#72066
A
when
B
how
C
whether
D
what
When asked to explain ________ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply.
#69377
A
what it is that
B
that what it is
C
what is it that
D
that what is that