---I didn't apologize to him for being unable to inform him of the change in the plan.
---But you________.
| A．ought to have |
| B．have to |
| C．should |
| D．must have |
We _____ the sunshine in Sanya now if it were not for the delay of our flight.
| A．were enjoying | B．would have enjoyed |
| C．would be enjoying | D．will enjoy |
_____ creative looks like a good way to add years to your life.
| A．Being | B．Been | C．Having been | D．Be |
-- Are you free now? I have something interesting to tell you.
--- OK, _____ you make it short. You know, I am busy.
| A．now that | B．as soon as | C．every time | D．as long as |
My mobile phone is missing. Who _____ it?
| A．must have taken | B．should have taken |
| C．could have taken | D．need have taken |
The young man, _____ in heavy traffic on the way, got home an hour later than usual.
| A．catching | B．caught | C．having caught | D．to be caught |