It is reported that the Group of Eight (G8)___ the eight richest countries in the world.

The children, ________ had played the whole day long, were worn out.

Could you please tell me about your travel to Shanghai — ____________.

He thinks that girls are smarter than boyswhen it comes to learning English. —-Buttwo years ago he thought_______.

_____in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.