In this section, we will briefly describe possible ways of reducing the costs and risks __________ in doing this.
My mother often asks me _____early .
Soon Wu Dong ____ up with Li Lei, then they were neck and neck.
The car ____and stopped at the red traffic light.
Tom ____ the CD player for two weeks.
---Do you know ______? ---Sorry, but if he _____ back, I ____ you know as soon as possible.