take an active part in 极政参加 极政参加	give way to 让位于 让位于	at the first attempt 首次尝试 首次尝试
keep （one's）balance 保持平衡 保持平衡	apply for 申请 申请	contribute to 有助于 有助于
preserve...from... 保护某人不受伤害 保护某人不受伤害	turn to sb. 求助于 求助于	be likely to 可能 可能
prevent...from... 阻止某人做某事 阻止某人做某事	set a limit to 对……设定限制 对……设定限制	at a loss 茫然 茫然

（1）Lincoln

took an active part in

took an active part in

polities and was strongly against slavery.
（2）The fats in fish are thought to

contribute to

contribute to

preventing heart disease.
（3）When a child has become accustomed to life in a city，he may feel quite

at a loss

at a loss

in any other environment.
（4）Whenever you are in trouble，you can

turn to

turn to

your parents or teachers for help.
（5）John did pass the driving test

at the first attempt

at the first attempt

，which made him excited.
（6）There's a position you long to

apply for

apply for

，so don't miss the good chance.
（7）Mary

is/was likely to

is/was likely to

fail in the exam because of her long absence from school.
（8）He should

give way to

give way to

a younger，more decisive leader，after all，he is in his sixties.
（9）The heavy traffic

prevented

prevented

him

from

from

attending the meeting on schedule，which made his boss quite angry.
（10）

Set a limit to

Set a limit to

the number of words you decide to remember，and stick to it.