He is _____ to staying up and getting up late, which is a bad habbit。
单项选择(每题1分) —Tomorrow is Christmas! —_____? We have no holiday anyway.
单项选择(每题1分) We must think twice _____ we make the final decision.
单项选择(每题1分) The stones each _____ as much as two tons.
单项选择(每题1分) Is this the reason _____ she explained in the report for her success in the job?
单项选择(每题1分) —Look, John’s fallen asleep at work! —Oh, he must have _____ late last night.