一How long can I keep these books?
一According to the library rules,you __________ return them within 7 days.
must
might
could
study in Lufu Middle School?
I always tell my students _________ on the road because it’s really dangerous.
There’re too many clothes in the shop. I really can’t decide .
--Look! Mum, this pair of gloves worn out. I need a new pair. –OK!
The teacher asked us_______ the question .