1.There are twenty one classroom in her school. ->Her school..................... 2.What is your age ->How old............... 3.Nam will visit his grandparents tonight ->Nam is................................ 4.I haven't player football since 1970 ->The last time...................... 5.We haven't seen Tom since he moved to bristol ->We last.................... 6.We will probably go to the moon for our summer hiliday in 2050 ->We might 7.If we do not use the car all the time,we won't make the air dirty ->Unless.............. 8.You plant more trees.The air will be frasher ->If you...................

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