Many people believe we are heading for environmental disaster(灾难) _______we radically(根本地) change the way we live .
At the meeting they discussed three different ____ to the study of English grammar.
He pretended _____ an important paper when the boss entered.
On AIDS Day, the minister of Health Department demanded that the problems _____ paid special attention to.
Although some people expressed their disagreement at the meeting, most of them were _____ the reform.
Studies have shown that children grow and develop quite normally on a diet ___ plenty of bread and vegetables with small amounts of milk and meat.