I’m learning to play ping-pong. — _____ . It’s a popular game. I like it very much.

. “I hear Johnson was badly injured in the accident.” “_______ let‘s go and see him.”

Shall we go for a picnic on Saturday or Sunday? — ______ is OK. I am free this weekend.

Is Mr Hu in the reading room?—No, he _______be there. He has gone to Tianjin.

What do you call this in English?—It’s a stamp. It is used ______ sending. [ ]