---Let’s back up. Where was I?
---You ___________________about the trip to South Africa.
| A．were talking | B．talked | C．are talking | D．would talk |
—Are you going to attend the academic lecture tomorrow?
—_____. I might have to pick my uncle up at the airport.
| A．No problem | B．It all depends | C．No way | D．It sounds great |
The boy was so ______ in reading that he didn’t hear his father knocking at the door.
| A．drawn | B．absorbed | C．valued | D．talented |
If you are travelling _______the customs are really foreign to your own, please do as the Romans do.
| A．in which | B．what | C．when | D．where |
-Did Linda see the traffic accident? -No, no sooner ______than it happened.
| A．had she gone | B．she had gone | C．has she gone | D．she has gone |
He asked them to come to his office one _____.
| A．at a time | B．at all time | C．at times | D．at one time |