题目

The staff’s hope of improving the working conditions ______ their new manager. A. keeps on     B. puts on        C. rests on                D. holds on 答案：C在括号里填上“t”、“kg”或“g”． (1)一头牛重240(　　)． (2)一块橡皮重5(　　)． (3)一袋大米重50(　　)． (4)一只大象重3(　　)．