Although Fleming discovered Penicillin, it was over a decade ______ someone else turned it into the great drug of the 20th century.
#92265
A
before
B
since
C
when
D
as
推荐题目
The Great Wall is _________________ tourist attraction that millions of people pour in every year.
#93585
A
so a well-known
B
a such well-known
C
so well-known a
D
such well-known a
Though it’s not the 1st time that I ________ Beijing, I still can’t adjust myself to the weather.
#92066
A
been to
B
had been to
C
have been to
D
went to
I’m so glad to see you back, Lucy. How long _______at your grandma’s?
#93838
A
had you stayed
B
did you stay
C
have you stayed
D
would you stay
—The weather isn't good enough for an outing，is it?—Not at all. We can't have ________ at this time of the year.
#92967
A
a worse day
B
a nicer day
C
such bad a day
D
so fine a day