-Why ________ it rain at weekends?-Never mind, let’s watch TV at home.

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

—Must I come back before supper, mum?—No, you        .

 --_____ you call back tomorrow? --Of course I can. 

—Shall I inform him of the change of the schedule right now?—I am afraid you ________, in case he comes late for the meeting.