According to the rules and regulations, all payments ________ be made in cash in the shopping center.

—Show me your permit, please.
—Oh, it's not in my pocket. It ________.

Harry is feeling uncomfortable.He________too much at the party last night.(2013·遼寧，31)

—You needn’t take an umbrella.It isn’t going to rain.
—Well，I don’t know.It________do.                             (2013·北京，35)

Since nobody gave him any help，he ________ have done the research on his own.
(2013·大綱全國(guó)，26)

—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report.                          (2013·四川，5)

It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words.                                                  (2013·安徽，34)

—________ you leave your room in such a mess?
—Sorry，Mum.I forgot to tidy it up.

Alex changed his mind at the last minute，otherwise we ________ an agreement.

— It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily.
—I can’t agree with you more.There ________ be errors for every single step.