If you go to Beijing, make sure you visit China Science and Technology Museum.It’s my favourite museum in the (整个的) country.
They are building a bridge (cross) the river.
Do you mind me ( open) the window?
Elephants are the ( large) land animals on earth.
Borrowers are expected (return) books on time.
Sorry for being late. I'm supposed to be here 20 minutes ( early).