---May I have a dog at home, Mum?---Yes, you can. But you must know how to ____________ it.
-What are you going to do this Sunday? -I ________ yet.
—When did you ____ the top of the mountain? —At 11;45 a.m.
—Have you found your watch? —No, it is ______to see anything in the hole.
—Are there any trees on _____ sides of the new street? —Yes, there are.
—____ my pen? —Yes, I ___ it on your desk five minutes ago.