The time he has devoted in the past 10 years____ the disabled is now considered ____ of great value.[ ]

Is it good to look up every new word when I come across it in reading?—No，you _____，because you are likely to guess the meaning from the context,

Jane, can I wear jeans and a T-shirt to the evening party? —OK. But a dress might be __.

From the ________ look on my teacher’sface, I know she was _______ with the results.

It is human nature to think backto a golden age ______ one’s country was strong andrespected