While building a tunnel through the mountain, _____.
| A．an underground lake was discovered | B．workers discovered an underground lake |
| C．there was an underground lake discovered | D．a lake was discovered underground |
Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.
| A．as if | B．now that | C．even though | D．so that |
The government has taken some measures to reconstruct the earthquake-hit areas, but it must be some time ________ everything returns to normal.
| A．since | B．after | C．unless | D．before |
The girl felt nervous at the stage with a lot of audience _______her.
| A．to stare at | B．staring at | C．stare at | D．stared at |
The house ________ I grew up has been taken down and replaced by an office building.
| A．that | B．in that | C．which | D．in which |
--- It is what parents say and do that really matters in children’s character training.
--- ___________.
| A．Properly | B．Doubtfully | C．Simply | D．Absolutely |