The silence of the library _____ only by the sound of pages being turned over.
| A．has been broken | B．breaks | C．broke | D．was broken |
If their oxygen, the two British mena chance of surviving.
| A．ran out, had | B．didn’t run out, would have |
| C．had run out, didn’t have | D．hadn’t run out, would have had |
By the middle of the 1920s the farthest corners of the earthexplored.
| A．are | B．were | C．have been | D．had been |
Under no circumstancesmy bike tomorrow.
| A．he is borrowing | B．is he to borrow |
| C．he will borrow | D．could he be borrowing |
Mr. Green stood up in defence of the girl, saying that she was not the one.
| A．blamed | B．blaming | C．to blame | D．to be blamed |
is to struggle.
| A．Living | B．Live | C．To live | D．To be lived |