My brother and I have _____ to do every

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问题选择题

My brother and I have _____ to do every evening.

A. a lot of homeworks
B. lot of homework
C. lots of homeworks
D. a lot of homework

答案

答案：D

填空题

( )×6<21	( )×4<18	42>( )×5
( )×7<57	80>9×( )	46>5×( )

填空题

2和6的最大公因数是（），12和18的最小公倍数是（）。