题目内容

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保证，担保；make sure确保，证实。句意：在大雾天气，我们不能确保火车能正点到达。选项A应该用be sure of; guarantee 对某事物的品质或人的行为"提出担保",对事物、商品等无质量,性能等方面的欺诈行为做出保证.故选D。
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