Meanwhile, ________ Wal-Mart succeed at shrinking its environmental footprint and lowering prices for green products, both the planet and the company will profit.
The education reform plan took one year and nine months to draw up, _____ public opinions were called for,
If Tom _____ my advice, he wouldn't have lost his job.
While _____ to foreigners, you must try to make yourself _____ by using body language if necessary.
—Wow, so many books here! How can you find the one I need? —Yhat’s easy.The books are _____ by subject.
—What sort of house do you want to have? Something big? —Well, it _____ be really huge梥ize isn't so important.