He told us he _______a concert________.
| A．had attended；three days before | B．attended；a week ago |
| C．would attend；since a week ago | D．was attending；for a week |
I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time.
| A．had already been done | B．has already been done |
| C．would be done | D．have already been done |
The teacher said that Columbus _______America in 1492.
| A．discovered | B．found | C．had discovered | D．had found |
Mr. Li is absent today. What do you consider ________ to him?
| A．happens | B．is happened | C．happening | D．has happened |
—Where are the guests to be from tomorrow?
—Many an American boy and many a British girl as well as the teachers to he present.
| A．have been invited | B．has been invited | C．were invited | D．was invited |
He made it clear that only the point that new technologies hold the key to increasing productivity the economy in the long run.
| A．will it benefit | B．it will benefit | C．will benefit | D．will benefit it |
Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
| A．became | B．had become | C．has become | D．becomes |
——Can you give me some advice on what I said just now?
—— Sorry, my mind ______ .
| A．has wondered | B．had wondered | C．is wondering | D．was wondering |
When I finally got up to leave, we both knew that a real friendship ________ between us
| A．have formed | B．will form |
| C．is to form | D．was to form |
— Why, David, you look so tired!
— Well, I ________an article and I must finish it tomorrow.
| A．was writing | B．will be writing |
| C．have been writing | D．have written |