I think ________ is very interesting to visit Beijing.

A. it

B. this

C. its

D. that

I think ________ is very interesting to visit the factory.

[　　]

I think ________ is very interesting to visit the factory.

[　　]

I think the book is very ________, but none of them is ________ in it．

1. A.
   interesting; interested
2. B.
   interesting; interesting
3. C.
   interested; interested
4. D.
   interested; interesting

I think that it's the ________ book I've read．

1. A.
   more interesting
2. B.
   very interesting
3. C.
   interested
4. D.
   most interesting