---Mum, I hurt my leg when I climbed the tree. --- You ___ that tall tree. I’ve told you many times.

The bus ____ at six, but it arrived an hour later.

That man over there _____ be Mr Wang . He has gone to Yushu. 

—Must I finish the homework tonight?—No, you        .You can finish it tomorrow.

---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunch.