—Where is your uncle?—He _____ to South Africa on business. He has ______ there twice.

We’ll ________  an English play “Snow White” during this year’s Art Festival.

 ----________does your brother do his homework?----At 8:00 in the morning.

— ________ have you learned to play the piano?— ________ five years ago.

---how many students are there in the classroom? ---_____Idon’t know where they have gone.