Students are often warned that anyone who leaves the classroom at night must remember to _____ all the lights, or he will be fined.

With so many problems __________, the new mayor will have a hard time in his poor town.

ognize and respect a country’s own culture does not mean to close the door to the others,_____ to stand upon a principle of being superior.

Not until the woman was out of work again two months ago _______ going to attend a training class.

I dislike shopping online, I prefer to actually see and touch what I’m buying before I pay for it, especially for clothes and shoes.—That’s right.___________.