I find _____ not easy to answer this question in English.
--- does your sister have lunch? --- At school.
She asked if I ________ to Beijing tomorrow. If I ________, she will go with me.
– I have no money. Do you have any? – No, I don’t have any money, ________.
We have ________ vegetables, so we have to go and buy some this afternoon.
While Helen __________ the guitar, her mother came in.