It ________ some time _________ I realized the truth.
#92551
A
was; before
B
is; before
C
has been; until
D
has been; after
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______ is know to all, china will be an________ and powerful country in 20 or 30 year’ time. 
#92637
A
That, advancing
B
This, advanced
C
As, advanced
D
It, advanced
-----Is this the first time you _____Chengdu ?-----No. But the first time I _____here, the city wasn’t so beautiful.
#92365
A
visited, came
B
visited, have come
C
have visited, have come
D
have visited, came
---Would you mind if I take the seat?     --- _____.
#93357
A
Yes, sit down, please
B
No, not at all
C
Surely, never mind
D
No, you can’t take it