______ with care, one tin will last for six weeks.
A．UseB．UsingC．UsedD．To use
C
考察非謂語動詞（作狀語）。非謂語動詞的考題，若空格在句首，句中有逗號，則應判斷空格部分與逗號之后的主語主被動關系。本句中的one tin和use應為被動關系，選擇動詞的過去分詞形式。句意：小心使用的話，金屬罐兒可以用六周。
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