— Could you introduce to me a high quality English dictionary for high school students? — Sure. _______ well for several years, this kind of dictionary is very popular.
People are very _____ about the problems ____ the environment.
The headmaster decided to have a word with whoever is ______ this matter.
This injury could mean him ______ tomorrow’s 110-meter hurdles.
_____ twice a year, whether it is a car or a bus, is a rule that every driver must obey in this city.
John is very _______. If he promises to do something, he will do it.