3. Our research has focused on a drug which is so _____ as to be able to change brain chemistry.

A. powerful    B. influential     C. monstrous    D. vigorous

 [答案] A. powerful

    [注释] powerful (=having or producing great power) 强有力的。在这里四个形容词中, 只有powerful (有效力的) 可与表示药物的名词搭配。influential 有影响的, 有势力的, monstrous 异常大的, vigorous 精力旺盛的, 强健有力的。

2. The boy slipped out of the room and headed for the swimming pool without his parents' _____.

A. command   B. conviction   C. consent   D. compromise

 [答案] C. consent

    [注释] consent 同意, 赞成, 答应。conviction 深信, 确信。compromise 妥协, 折中。command 命令, 指令; 掌握, 运用能力。

1. In this factory, suggestions often have to wait for months before they are fully _____.

A. admitted   B. acknowledged   C. absorbed  D. considered

 [答案] D. considered

     [注释] considered 考虑; admit 承认; absorb 吸收。

     [注意]acknowledge 1) (=agree or admit the truth of; confess) 承认, 供认; A. He acknowledged his mistake. (他承认了他的错误。) B. 接动名词 He acknowledged having been beaten. (他承认被打败了。) 2) (express thanks for) 致谢; A. Mary acknowledged the gift with a pleasant letter. (玛丽致函感谢馈赠的礼物。) B. His long service with the company was acknowledged with a present. (向他赠送礼品以感谢他长期来对公司的服务。)

765.roll over

强化训练：

高考英语词汇400题及详解

764.pass down from generation to generation

763.once in a while

762.in chains

761.become of

760.have a hard time

758.give in

759die out