The twins_______ after school every day.
We were told that Mr Green _____ the office for a few minutes when we arrived.
Your idea is considered to be _____ great value _____him.
Please don’t stand up in class _____ you ______.
-----Could you tell me ______ to go to Hannan by air? -----Just a minute, please. Let me have a look.
----“Have you ever been to HK, Jim?” ----- “ Yes , I ______ there for two weeks with my parents last summer.”