P4
1.The birds were active（活躍），whirring and fluttering (呼呼地飛來(lái)飛去）among the trees.
2.He is a young man of sharp and active intellect(具有靈活和敏銳頭腦）.
3.Companies need to take active steps (采取積極措施）to increase exports （增加出口）.
4.An active and expansive (積極擴(kuò)張的) market economy (市場(chǎng)經(jīng)濟(jì)）is a necessary condition for progress.（是發(fā)展的必要條件）
5.The active ingredient（有效成分）in some of the mouthwashes （漱口劑）was simply （只不過(guò)是）detergent （洗滌劑）.
6.The volcano is still active（活躍）, as evidenced by （證明了）the recent eruption（最近噴發(fā)）.
7.The alarm is activated （觸動(dòng)胸囱，激活）by the lightest pressure.
8.It seems that the 1960s era of social activism(社會(huì)激進(jìn)主義） is all but （幾乎）a dim memory.(模糊的記憶）（20世紀(jì)60年代的社會(huì)激進(jìn)主義似乎只是一個(gè)模糊的記憶祷舀。）
9.Animal rights activists (動(dòng)物權(quán)利保護(hù)者）have been engaged in an increasingly bitter（ 展開(kāi)了越來(lái)越激烈的論戰(zhàn)）war of words (論戰(zhàn)，唇槍舌劍）with many of the nation's zoos(和該國(guó)多家動(dòng)物園）.
10.There are signs of paramilitary （準(zhǔn)軍事的）activity supported from abroad.（有跡象表明烹笔，非法軍事組織的活動(dòng)得到了外國(guó)勢(shì)力的支持裳扯。）
