15. striven. try very hard (to obtain or achieve sth. )(为获得或实现某事)努力，奋斗
e.g.: strive for success 力争获得成功。
必背搭配 strive after / for / toward; strive with / against
派生词汇 strivingly adv. 努力地
从以上单词中选出最恰当的词，填入空格内。
Exercise:
__1__is an imaginary island invented by Sir Thomas More.
We cannot see our way in the __2__dark.
The beggar only asks a __3__ sum of money but is refused disdainfully by the gentleman.
__4__ is the science that studies the effects of forces on the motion of a body or system of bodies, especially of forces that do not originate within the system itself.
You__5__ the smell of greasy food when you are seasick.
John Dennis traveled across the __6__ Alps in 1688.
Most plants __7__ by seed.