1.有多種因素導(dǎo)致了出生率下降。

There are various factors _______________ _______the lowered birthrates.

許多專家堅(jiān)信這種全球變暖主要?dú)w咎于人類活動(dòng)。

2.Many experts insist that the _____________ for this global warming can mostly be _______ _______ human activities.

3.在他們永遠(yuǎn)消失之前我們要代表他們大聲疾呼。

We need to speak out ______ _______ _______ before they disappear _______ _______.

4.你們說只要我預(yù)先付款就會(huì)有優(yōu)惠。

You say that there is a discount ________ _________ I pay _______ _________.

5.我們?nèi)〉煤芏噌t(yī)學(xué)進(jìn)步,包括從顯微鏡下發(fā)現(xiàn)疾病的起因到用捐贈(zèng)器官替代病變器官這樣的外科手術(shù)過程。

We have made medical advances, __________ ________ discovering the causes of diseases under microscopes_________ surgical procedures replacing diseased organs with donated ones.

 

1.contributing to

2.blame pinned on

3.on their behalf for good

4.provided that in advance

5.ranging from to

【解析】

1.contributing to考查動(dòng)詞短語。Contribute to 導(dǎo)致。現(xiàn)在分詞做伴隨狀語。

2.blame pinned on考查動(dòng)詞的用法。Insist做堅(jiān)信講時(shí)，應(yīng)該用什么時(shí)態(tài)用什么時(shí)態(tài)。Be pinned on 歸咎于。

3.on their behalf for good 考查介詞短語。On one’s behalf 代表。。for good 永遠(yuǎn)。

4.provided that in advance考查動(dòng)詞與介詞短語。In advance 提前。

5.ranging from to考查動(dòng)詞的用法。Rang from ..to ..從。。到。。不等。

考點(diǎn)：補(bǔ)充句子。

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