'Materials conductors' presentation slideshows

52.1)None of the money ___ mine. 2)None of the materials ___ conductors.

52.1)None of the money ___ mine. 2)None of the materials ___ conductors. 3)None of them ___ a good singer. A. is B. are C. was D. were 53.1) I know what he wants ___ when he grows up. 2)I know what he wants ____ your help. A. to be B. being C. is D. be.

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