You should look after,classmates.

We’ll go to Qing Yuan Mountain tomorrow. Why _____ join us? —That’s a good idea. [ ]

Could you tell me ______?-Yes. To take back my dictionary.

What do you think of the students of Meiling Middle School?—They study _____ harder than before.[]

I’m so glad to see you back, Lucy. How long _______at your grandma’s?