–– When did they arrive?
–– They ______two hours ago .They ______ here for two hours .
| A．arrived; have arrived | B．arrived; have been |
| C．got; have been | D．reached; have reached |
–– When did they arrive?
–– They ______two hours ago .They ______ here for two hours .
| A．arrived; have arrived | B．arrived; have been |
| C．got; have been | D．reached; have reached |
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