Onen the brackets and use right tense 1)they just (to arrive) at the airport. 2)my nephew (to read) a book at the moment.and his parents (to watch) tv. 3.the teacher (to explain) the rule now but her students (not to understand ) it. 4.he usually (to ride) his bike on sundays. 5.they (buy) this car a week ago. 6.tom (know) mary since last year. 7.they (play) football for an hour.

they just arrive at the airport.
2) My nephew will read the book at the moment. And his parents will look at the TV.
3. The teacher explained the rule now, but her disciples did not blame it.
4. He usually rides a bike on Sundays.
5. They (bought this car a week ago.
6.Tom (knows) Mary from last year.
7. They (play) football for an hour.