It’s the first time that he has been to Australia, _______  ? 

_____ you _____ to go to the park when they were children?

 --Look at the photo , is this Gina’s mother?--Yes, _______.

No one will be sad because humans will have learnt to fix many of the problems that affect us now, like war, pollution and hunger, ________ ?

. Reading books is very important for developing the students’ understanding of the world, _______?