The plane ＿＿＿＿＿ at 7：00 p.m., so I have to be at the airport by 6：40 at the latest.
| A．has left | B．is to leave | C．will have left | D．leaves |
I would have come earlier, but I ________ that you were waiting for me.
| A．didn’t know | B．hadn’t know |
| C．would have known | D．haven’t known |
But for the party, he ________ of hunger fifteen years ago.
| A．would have died | B．would die |
| C．must have died | D．must die |
. If only I ________ how to operate an electronic computer as you do.
| A．had known | B．would know |
| C．should know | D．knew |
If he had not gone out in the storm, he ________ alive now.
A will beB. would be
C. would have beenD. is
Without electricity human life ________ quite different today.
| A．is | B．will be |
| C．would have been | D．would be |