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
— Where did you meet your middle school teacher?— It was in the supermarket ______ I was doing some shopping with my son.
#92148
A
that
B
where
C
when
D
which
_______ the website of Entertainment in Baidu, and you will learn that the Korean singer PSY has released a new song named Gentleman.
#92394
A
Having searched
B
To search
C
Searching
D
Search
Only when your identity has been checked, ___________.
#93198
A
you are allowed in
B
you will be allowed in
C
will you allow in
D
will you be allowed in
How long do you think ______ the Microsoft brings out a new product?
#92259
A
it will be before
B
will it be until
C
will it be when
D
it will be that