hear 0f听到，听说
put into effect生效
get out of control失控
come to a conclusion得出结论
decline invitation辞谢邀请
put into use使用，应用
put into practice落实
be satisfied with满足
hardlywhen刚就
avoid doing sth.避免干某事
come about发生，出现
in support 0f支持
bring about发生，引起
be different from与不同
out of the question绝不可能
in time及时
indifferent to不在乎
above all最重要的
prepare for准备
first of a11首先
get to开始;到达
at the moment此刻
be on sale 出售
carry through完成
be in demand需要
the key to的答案