______ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
| A．To wait | B．Have waited |
| C．Having waited | D．To have waited |
— Thank you for joining in my birthday party.
— _______.
| A．It’s my duty | B．It’s right | C．It’s my pleasure | D．It’s nice to say so |
-------- Hey, look where you are going !
------- Oh, I’m terribly sorry. __________.
| A．I’m not noticing | B．I wasn’t noticing |
| C．I haven’t noticed | D．I don’t notice |
Robert is said _____ abroad, but I don’t know what country he studied in .
| A．to have studied | B．to study |
| C．to be studying | D．to have been studying |
_____ him and then try to copy what he does .
| A．Mind | B．Glance at | C．Stare at | D．Watch |
------ Alice, you feed the bid today, _______ ?
------ But I fed it yesterday .
| A．do you | B．will you | C．didn't you | D．don't you |