He didn't go by bike with me.That's ________ there was something wrong with his bike.
Can you imagine that a smart man like him_____ make such a stupid mistake?
--- Who told you my address ? --- I don’t remember clearly. It _____ Li Mei. ---It _____ Li Mei. She doesn’t know it.
.---This _____ John's house .It's number 101. --- I don't think so.He said a large white house but this is a small yellow one.
As is natural , a man as old as he ______ be very forgetful.
---Did you visit the famous museum ? ---No. We ______ it. But we spent too much time shopping.