It is almost half a year workers started building the underground Line 1 in Nantong．（ ）
A．whenB．sinceC．beforeD．after
We can't leave here until our teacher _____．（ ）
| A． |
will arrive |
| B． |
arrives |
| C． |
arrived |
Could you tell me _____？
In Xinhua Bookstore．（ ）
| A． |
where you bought the book |
| B． |
where did you buy the book |
| C． |
where do you buy the book |
I think Mark is _____ of all the boys in our class．（ ）
| A． |
most outgoing |
| B． |
more outgoing |
| C． |
the most outgoing |
_____ interesting stories they are!（ ）
| A． |
What an |
B． |
How |
C． |
What |
This is my pet dog．_____ name is Dingding．（ ）
| A． |
Its |
B． |
It's |
C． |
It |