With more forests being destroyed, huge quantities of good earth each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
I was really anxious about you. You____ home without a word.
| A．mustn’t leave | B．shouldn’t have left | C．couldn’t have left | D．needn’t leave |
—May I smoke here? —If you _____, choose a seat in the smoking section.
| A．should | B．could | C．may | D．must |
If you cheat in the exam, you’ll never_____ it.
| A．keep up with | B．get away with | C．get down to | D．look forward to |
Would you please keep silent? The weather report ________ and I want to listen.
| A．is broadcasted | B．is being broadcast | C．has been broadcasted | D．had been broadcast |
__________the teacher entering the classroom, the boy pretended _______ the text.
| A．To see ; to read | B．Seen; reading | C．Seeing; to be reading | D．Seeing; to have read |