---You were out when I went to your house this morning. ---Oh, I _______ for a friend from England at the airport.
Could you please tell me _______?
I found ________ difficult to work out the problem without a computer.
---I don’t know what _____ if I do that. ---I think you ______ tell him the whole thing first.
---Why are you driving so fast? ---Because my flight is _______.
---Can you go shopping with me tomorrow? ---Sorry. I have to _____ my sick mother at home..