20．雖然網(wǎng)上的信息應(yīng)有盡有，但要辨別真?zhèn)我步^非易事．（available）Althoughallkindsofinformationareavailableonline，itisnoeasyjob/tasktotell/judgewhichistrue．．

分析 Although all kinds of information are available online，it is no easy job/task to tell/judge which is true．

解答 Although all kinds of information are available online，it is no easy job/task to tell/judge which is true．
本句是對(duì)網(wǎng)上信息的一種評(píng)價(jià)，所以用一般現(xiàn)在時(shí)．
該句應(yīng)該使用although引導(dǎo)的讓步狀語從句，后面的主句中it為形式主語，不定式為真正的主語，不定式中又有一個(gè)which引導(dǎo)的賓語從句．a(chǎn)ll kinds of 各種各樣的；be available可得到的，可利用的．

點(diǎn)評(píng) 本句中注意although不能和but同時(shí)出現(xiàn)在一個(gè)句子中，但是翻譯成漢語時(shí)要翻譯成"雖然…但是…"，這和漢語的思維不同．

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