When Jack arrived, he learned Mary _____ for almost an hour.
| A．had gone | B．had set off | C．had left | D．had been away |
The businessperson wanted to sell his goods fast: ______, he chose his partner with great care.
| A．and | B．otherwise |
| C．however | D．therefore |
The experienced teachers try their best _____ the younger ones _____experience.
| A．to help…getting |
| B．help…get |
| C．to help…to get |
| D．helping…get |
John is not a man to count on, and it is very likely that the work ____ by the time he arrives here.
| A．is finished | B．has finished |
| C．will finish | D．will have been finished |
Most probably it will be another 7 hours _____ you can have next meal, so each of you must have your stomach full.
| A．since | B．when | C．after | D．before |
Tony is a quiet boy and he is accustomed ______ at meals, which is always appreciated.
| A．not to talk | B．to not talk |
| C．to not talking | D．not to talking |