17．Tom今天沒(méi)來(lái)上學(xué)，因?yàn)樗旧狭肆鞲校╥nfect）Tom is absent from school today because he is infected with a flu．．

分析 Tom is absent from school today because he is infected with a flu．

解答 根據(jù)句中時(shí)間狀語(yǔ)"今天"，判斷可知本句使用一般現(xiàn)在時(shí)．
使用because 引導(dǎo)原因狀語(yǔ)從句．
沒(méi)來(lái)…be absent from，染上了…be infected with．

點(diǎn)評(píng) 本題主要考查時(shí)態(tài)一般現(xiàn)在時(shí)表示目前的客觀事實(shí)，短語(yǔ)be infected with表示染上了…．

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