It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
| A．shall | B．will |
| C．need | D．may |
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—Mum, where is my toy train? You promised.
—_____, my but you know mum is pretty busy today. Tomorrow, OK?
| A．So it is | B．So is it | C．So did I | D．So I did |
As long as you’ve paid _________ advance we won’t charge you _________ delivery.
| A．by: for | B．in; with | C．in; for | D．by; with |
At first he refused to admit he had stolen but when he was shown the videotape he ______ and admitted everything.
| A．broke down | B．broke away | C．broke up | D．broke out |
Only when _________ be possible to sign the papers.
| A．does the boss come will it | B．the boss comes will it |
| C．has the boss come it will | D．the boss comes it will |
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