On no account（）to be exceeded.<br>A:is the S.W.L. of the crane<br>B:are the S.W.L. of the crane<br>C:the S.W.L. of the crane is<br>D:the S.W.L.of the crane are

On no account（）to be exceeded.
A:is the S.W.L. of the crane
B:are the S.W.L. of the crane
C:the S.W.L. of the crane is
D:the S.W.L.of the crane are

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