Please tell him to leave the window _______ .
| A．is open | B．opened | C．open | D．opening |
Everyone is ____ to see such a _____ snake.
| A．surprised, surprised | B．surprising, surprising |
| C．surprised, surprising | D．surprising, surprised |
It’s difficult for such a girl to swim ____ the river.
| A．cross | B．across | C．crossing | D．crossed |
—Would you like to go out for a walk with us?
—,but I must finish my homework first.
| A．Of course not | B．That’s all right | C．Yes, I’d love to | D．Yes, I do |
I usually sleep with the window open _____ it’s very cold.
| A．until | B．unless | C．when | D．if |
We have to _________our school trip till next week because of the heavy rain.
| A．put off | B．put on | C．put up | D．put down |