We were delayed at the airport．Otherwise，we here by lunch．
| A．must have been | B．could be |
| C．should be | D．would have been |
As an employee, I couldn’t help but ______ still for hours as the boss told me to.
| A．stood | B．stand | C．to stand | D．standding |
Julie was good at German, French and Russian, all of _____ she spoke fluently.
| A．who | B．whom | C．which | D．that |
The scientific research on how to protect the rare animals is ________. Many scientists are working hard to find new way to raise the animals by man.
| A．in danger | B．in control | C．in order | D．in progress |
Michael __________ here to see you and he____________ a note on your desk.
| A．has come; had left | B．has been; has left |
| C．has come; left | D．has been; left |
—Grace, when shall we take a walk?
—After I finish________ the dishes.
| A．wash | B．washing | C．washed | D．to wash |