单项选择题
--I posted the package a week ago.--Then they （） the package by now. It usually takes 5 days.
A. must received B. can have received C. ought to have received D. should received
单项选择题 It is in this factory （） I worked for ten years.
单项选择题 --Which one can I take--You can take （） of them. I'll keep none.
单项选择题 Tom is the man who always does （） best even in the most difficult situation.
