Where are my keys? I must __________.
---Did you go to Tom’s twelfth birthday party last Sunday?--- No, I ________ .
In some foreign countries, such as Canada, children usually leave their parents when they grow up. It makes the old feel_______.
---What ______ do you have for Paul?---I think he should study harder than before.
---You look so cool!---Really? But ______has ever told me that before.
---How long did you spend going through the jungle during the exciting vacation?---Going through the jungle______ us about three weeks.