_____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.
| A．As; whom | B．What; whom | C．It; whose | D．As; whose |
Had it not been for the police’s help, Peter his bicycle yesterday afternoon.
| A．could not find | B．could not have found | C．didn’t find | D．hadn’t found |
He’s teaching me French my teaching him Chinese.
| A．in place of | B．in case of | C．in exchange for | D．in honor of |
Instead of staying the same every day, Mary’s working hours are .
| A．limited | B．available | C．valuable | D．flexible |
My money . Could you please lend me some?
| A．has run out of | B．was running out | C．has run out | D．was run out of |
The boy was curious about how the waste paper was into a model kite.
| A．improved | B．united | C．transformed | D．mixed |