Tom was walking along the riverside when he heard someone calling him from behind. He turned around_______ found nothing.
| A．but | B．and | C．so | D．or |
— Why is your bedroom so dirty?
— Sorry, Mum. It ___________. I felt very tired after playing soccer.
| A．isn’t cleaned | B．didn’t clean | C．doesn’t clean | D．wasn’t cleaned |
—Did you ______that Nancy has been a littletoo quiet these days?
— Yes. She didn’t even say a word this afternoon.
| A．hope | B．notice | C．explain | D．decide |
— Oh, dear! There isn’t enough _____ for us in the lift.
— No hurry. Let’s wait for the next.
| A．floor | B．seat | C．room | D．ground |
Do you know the girl _______is singing in the classroom?
| A．who | B．which | C．when | D．that |
—I don’t know _______ now.
—She is much better today.
| A．how is she | B．where is she | C．how she is | D．where she is |