He commanded that all the gates _____when it was getting dark in case thieves came in .
| A．were shut | B．must be shut |
| C．could be shut | D．be shut |
More and more people choose to shop in a supermarket as it offers a great _______of goods.
| A．variety | B．mixture | C．extension | D．combination |
Life is tough in the city. In order to lose their ，some people drink alcohol.
| A．temper | B．mood | C．consciousness | D．pressures |
One of the consequences of our planet's being warming up is a（n）_______ in the number of natural disasters.
| A．result | B．account | C．reason | D．increase |
“I don't think it's my ________that the TV blew up. I just turned it on，that's all，”said the boy.
| A．error | B．mistake | C．fault | D．duty |
—I’m sorry I stepped outside for a smoke. I was very tired.
—There is no______ for this while you are on duty.
| A．reason | B．excuse | C．cause | D．explanation |