It’s getting late. We must "be off" now. Which of the following can’t replace the underlined part?
| A．begin | B．be leaving | C．start | D．go |
Our manager has gone to Paris, so I have to deal with all the letters during his ________.
| A．appearance | B．distance | C．absence | D．presence |
To qualify yourself for this kind of new job, I recommend that you ________ some online courses.
| A．to take | B．taking | C．take | D．would take |
I soon found that the work I was doing had already been done by someone else —________ I was wasting time.
| A．as a result | B．in the meantime |
| C．in other words | D．for one thing |
The doctor has worked with patients of this kind for eight years, so he knows what ________ in his job.
| A．expected | B．to be expecting | C．expects | D．to expect |
—Who telephoned you just now?
— don’t know. I was about to answer the phone when it ________.
| A．rang up | B．rang off | C．hung on | D．rang back |