We can’t ____ the punctual arrival of trains in foggy weather.
A．be sureB．guardC．guaranteeD．make sure
D
考查sure 用法。be sure相信；guard警惕； guarantee保證，擔(dān)保；make sure確保，證實。句意：在大霧天氣，我們不能確�；疖嚹苷c(diǎn)到達(dá)。選項A應(yīng)該用be sure of; guarantee 對某事物的品質(zhì)或人的行為"提出擔(dān)保",對事物、商品等無質(zhì)量,性能等方面的欺詐行為做出保證.故選D。
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