1. —What do you think of their school?

—It's really beautiful. But I don't think their school is as big as________.

A. ours                              B. us                                  C. we                                D. our

2. He used to be________, but now he likes to meet and talk to new people.

A. busy                              B. strong                            C. tall                                D. shy

3. When I got there, he________them to dance.

A. is teaching                     B. teaches                          C. was teaching                  D. taught

4. Work hard, ________ you will succeed sooner or later.

A. and                  B. but                  C. also                  D. or