He was born __________ a cold winter morning.
| A．on | B．at | C．in | D．for |
If_____litters, our world will be more beautiful．
| A．everyone | B．someone |
| C．anyone | D．no one |
—Can the plane fly _____ the Atlantic Ocean?
—Yes,but it needs to go_____the clouds for hours．
| A．across,through | B．through, across |
| C．across,across | D．through, through |
—Can you tell me _____when the teacher came into the classroom?
—Sorry,I don’t know．
| A．what were the students doing |
| B．what are the students doing |
| C．what the students were doing |
| D．what the students are doing |
The teacher said that _____ of the boys would take part in the fashion show．
| A．two third | B．three fives |
| C．three quarters | D．three fifth |
—______ did your sister leave China?
—She______ for three years ．
| A．When, has left | B．When ,has been away |
| C．How long,has left | D．How long,has been away |