题目

“Shall we go shopping?” “Sorry, we _______ buy anything now because none of the shops are open.” A. mustn’t       B. needn’t      C. can’t             D. shouldn’t 答案:C 解析: 根据上下文的语境推知。can’t 意为“不能”。3.把3米长的钢管锯成相等小段,锯了4次,每段是全长的$\frac{(\;\;\;\;)}{(\;\;\;\;)}$,每段长$\frac{3}{5}$ 米.
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