Helen, do you know if Martin _______ to my party next week?——I think he will come if he ______ free.

Can you guess _______ the new Nike sports shoes?—Yes, maybe he asked his grandpa for the money, I think.

What would you like to do this Sunday?—–If it doesn’t rain, I _______to Mount Qingyun for a spring field trip.

It was quite a long time________ I made it out what had happened.

What_______ your father do? — He is a teacher.