. Knowledge of English is a must in international trade.
.If you try your best to study, I think it quite _____that you will catch up with other students.
.In _______ summer of 1963 Martin Luther King Jr. gave _______ speech to many black people.
.-Don’t be late for the meeting this afternoon!-_______
.Water as well as other resources ______ all over the world every day.
.The teaching building is _________ by many trees, some ______ over 30 metres.