Make sure the gas is turned off after a bath, which would _____ cause danger[ ]

Would you like to go on a trip with us— I’d love to, _______ I have too much work to do this weekend.

10—–Can you attend the meeting tonight? —–No,the manager about something important

Walmart，which is one of the largest American supermarket chains，________ some of its stores open 24 hours on Mondays through Saturdays.(2012·安徽)

___students will take part in the sports meeting and _____them is over three hundred.