Casual workers are usually paid ______ the hour.
A. by B. on C. to D. with
答案是 by。但为什么不能是 on 呢?on the hour 的搭配我也见过。如:
A bus leaves for New York on the hour.
We expect her to do the housework as well as _____ the children.A. look after B. looking after选择 A,是不是省略了to(本该 to look after),由于前面有实义动词 do, 所以省略了to?另外该题也可以选择 B,意为:做家务如照顾孩子一样好。不知对否...