Aluminum isn’t found free in nature, owing to its always ____ with other elements, most commonly with oxygen.
| A．being combined | B．having combined |
| C．combine | D．combined |
“How long have you stayed in this hotel?” “Not long, just ______ this Monday.”
| A．on | B．since |
| C．until | D．after |
So far, several ships have been reported missing _______ the coast of Bermuda Island.
| A．off | B．along |
| C．on | D．around |
We all regarded the poor old man ____sympathy.
| A．as | B．with |
| C．of | D．by |
We’ve talked a lot _______ films. How _____ television now?
| A．of, with | B．with, towards |
| C．about, about | D．for, about |
In those days, we had no phones, so we have to keep in touch _____ writing often.
| A．with | B．of |
| C．on | D．by |