________ in my life impressed me so deeply as myfirst visit to Qinghai Lake.

Don’t refer to the dictionary every time you come across a new word as sometimes its meaning may be _______ clearly in a given context.

下列句中加点词语发生活用的情况不同其它三项的是（ ）

thstoodbesidethewindow,hisattention____thecaroutside.

Americans eat ______ vegetables per person today as they did in 1990.