It was only after he had read the papers    Mr. Gross realized the task Before him was extremely difficult to complete.
#84927
A
when
B
that
C
which
D
What
推荐题目
– What did he want to know, Jack?- ________ that we would have the picnic on Sunday.
#85289
A
what it was
B
when it was
C
whether it was
D
where it was
-- I didn't realize how popular the restaurant was until I made a reservation the other day.-- I beg your pardon, but when __________?
#84904
A
was you realized it
B
it was that you realized it
C
you realized it
D
was it that you realized it
It was ______ back home after the experiment. 
#85256
A
not until midnight did he go
B
until midnight that he didn’t go
C
not until midnight that he went
D
until midnight when he didn’t go