challenge
【点拨】challenge作名词，可以表示以下含义：
a. 挑战；挑战书 b. 质疑 c. 挑战性 d. 具有挑战性的事物
【看例句记词义】辨析下列各例句中challenge的含义，把相应的字母填到句后的横线上。
Making a speech in front of many people is always a challenge for me. _______
His article is a challenge to the theory that low lf-esteem has something to do with unhealthy lifestyles. _______
The tiger roared (怒吼) a challenge to the enemy in the distance. _______
There must be very little challenge in the work for you. _______
Keys: dbac
【拓展】challenge还可以作动词，表示以下含义：
(1) 表示“向……挑战”，常用搭配有challenge sb to sth, challenge sb to do sth。如：
He challenged John to a fight as soon as he saw him.
他一见到约翰就向他提出挑战，要求打一架。
The German boy challenged the Korean boy to discuss the matter with him in English.
那个德国男孩向那个韩国男孩挑战，让他用英语跟他讨论那个话题。
(2) 表示“激励”，常用搭配是challenge sb to do sth。如：
His new findings challenged him to rethink the skills he was using.
他的新发现激励他重新审视他所使用的技巧。
(3) 表示“对……表示质疑”，常用搭配是challenge sth。如：
In our group discussion, ideas are challenged, corrected, and challenged again.
在我们小组讨论的时候，各种想法被质疑了，然后被修改，然后又被质疑。
【即学即练】补全句子，每空一词。
1) In public, Michael challenged him _______ a dance contest.
2) He had actually said the things to her when she challenged ______ ______ name his complaints.
4. support
【点拨】support作动词，可以表示以下含义：
a. 支撑；承受重量 b. 供养 c. 支持
【看例句记词义】辨析下列各例句中support的含义，把相应的字母填到句后的横线上。
He has to work hard becau he has a large family to support. _______
Will you support me in this election (选举) _______
The plastic (塑料的) table can’t support the television. _______
Keys: bca
【拓展】support还可以作名词，表示“支撑；支柱；支持；支援”等含义。
【即学即练】补全句子，每空一词。
1) 他那瘦弱的双腿不足以支撑他的体重。
His weak legs are not strong enough to _______ ________ _______.
2) 在这件事情上，我们是支持你的。
We ______ ______ in this matter.
3) 经过两星期的艰苦工作之后，我们赢得了他的支持。
We finally won ______ _______ after two weeks of hard work.
