单项选择题
--The hospital was ______ fire last night.--Really Someone must have set fire ______ it.
单项选择题 -- How much is your new computer ______-- 12,000 Yuan.
单项选择题 --I posted the package a week ago.--Then they ______ the package by now. It usually takes 5 days.
单项选择题 It is in this factory ______ I worked for ten years.
