a. "Why don't we go out for a walk" Lan asus
---> Lan suggested__going out for a ưalk__
b. He started study Chinese five years ago
---> He has___studied Chinese for five years __
c. I think you should study harder for the exam 
---> If I___were you, I would study harder for the exam __
d. Your dictionary is more expensive than mine 
----> My dictionary isn't __as expensive as yours_____

a.  Lan suggested going out for a walk
b. He has studied Chinese for 5 years
c. If I were you, I would study harder for the exam
d. My dictionary isn't  more expensive than yours