This math problem is        that one.

A. as difficult as                                              B. so easy as         

C. much difficult than                                       D. less easier than

This morning Jack came to school __________ than ________ student in his class.

A. much late; any                   B. much later; any other

C. much later; any                  D. much later; any other

I prefer skiing to climbing because I think climbing is __________ skiing.

A. not as exciting as               B. not more exciting as

C. not most exciting as             D. more exciting than

China is the third _______ country in the world.

A. large                        B. largest                      C. larger                       D. as large as

There are a lot         people today than yesterday．

A．of                B．most             C．＼                   D．more