Sam:________Lisa:It's four o'clock.A.What's in the box? B.What time is it?
Today is Liu Tao's birthday. Shall we ______ a birthday card for him?
-Look at the beautiful flowers over there.-Let ________ go and see.
Oh,my glasses are on the floor. Can you pick ________ up for me,please?
It ________ there a moment ago.
Helen is looking _______ her pencil.