I have two brothers, ________ are doctors.
| A．both of them | B．both of whom | C．neither of whom | D．each of them |
If their oxygen , the two British men a 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 earth explored.
| A．are | B．were | C．have been | D．had been |
Under no circumstances my 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 |