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 —Why aren’t they here yet?

         —They_____ the bus.

         A．can have missed                  B．must be late for

         C．may have missed                D．might be late for

—Why aren’t they here yet?

—They           the bus.

A．can have missed                                         B．must be late for

C．may have missed                                        D．might be late for

—Why aren’t they here yet?

       —They           the bus.

       A．can have missed             B．must be late for

       C．may have missed            D．might be late for

—Why aren’t they here yet?

         —They _______the bus.

         A．can have missed                  B．must be late for

         C．may have missed                D．might be late for

—Why aren’t they here yet?

       —They            the bus.

       A．can have missed  B．must be late for  C．may have missed            D．might be late for