The recent financial crisis _______ into consideration, the Japanese boss ______ back on the number of workers working for him.
| A．taken; cut | B．was taken; cut | C．taking; cuts | D．to take; cutting |
I won’t tell the student the answer to the math problem until he ____on it for more than an hour.
| A．has been working |
| B．will have worked |
| C．will have been working |
| D．had worked |
Father _____for London on business upon my arrival, so I didn’t see him.
| A．has left |
| B．left |
| C．was leaving |
| D．had left |
The father as well as his three children ____skating on the frozen river every Sunday afternoon in winter.
| A．is going |
| B．go |
| C．goes |
| D．are going |
Although the causes of cancer _____, we do not yet have any practical way to prevent it.
| A．are being uncovered |
| B．have been uncovering |
| C．are uncovering |
| D．have uncovered |
At this time tomorrow ____over the Atlantic.
| A．we’re going to fly |
| B．we’ll be flying |
| C．we’ll fly |
| D．we’re to fly |