---- Do you know Neil Armstrong? ---- Yes, he is the first man ___ on the moon..
—Which do you like better, tea or coffee?—I prefer coffee ________milk.
You can never imagine what great difficulty I had _________ your house.
Mr Ma prefers ______ his dog after supper _______ him relaxed every day.
—When will you come to visit our city, on Saturday or Sunday? —___________ day is OK. I’m free at weekends.
Jack _____________. Now he can go to school by bike.