①His (one) name is Mike. But I don't know his family name.  

② “May I borrow your dictionary, Jim? ” “Oh, sorry. It isn't (my). ”

③I saw our math teacher talking with John when I (pass) his office.

④Playing computer games is delightful, but (spend) too much time on it may do harm.

⑤Both coats look nice on me. I really don't know which (choose).

⑥It's (polite) to laugh at people in trouble.

⑦ You are late again. Would you please get up (early)next time?

⑧Mrs. Chan told us to write as (care) as we could.

⑨ I think the red skirt looks as (good)as the green one.

⑩ To keep healthy, I decide (exercise) an hour every day.