用7、8、9这三个数字组成最大的三位数是[ ]
A.879
B.978
C.987
答案:C
18的( )倍是468,714是42的( )倍。
I can________the house being untidy, but I hate it if it's not clean. [ ]
A. come up with
B. put up with
C. turn to
D. stick to