Viết lại câu có nghĩa câu đã cho

a. "Why don't we go out for a walk" Lan asus
---> Lan suggested____
b. He started study Chinese five years ago
---> He has_____
c. I think you should study harder for the exam 
---> If I_____
d. Your dictionary is more expensive than mine 
----> My dictionary isn't _______