I didn't see you at Jim's party last week.
I had to work that evening, so I _________ go.( )
A.needn'tB.mustn'tC.couldn'tD.shouldn't
下面算是中( )的商最接近70. A.254÷5 B.503÷7 C.400÷8
下面的算式中,结果在6000左右的算式是( ) A.41×305 B.19×299 C.29×302
估算902÷31,结果是( ) A.3 B.30 C.40
□7,要使商是一位数,□里可填( )
( )最接近5962÷60准确的商. A.900 B.1000 C.100