An engineer __ _ an ore to find out whether it contains impurities (杂质).
— I would like to make an appointment for the meeting. Which day would you prefer, Tuesday or Thursday?
— _________________
— I would like to make an appointment for the meeting. Which day would you prefer, Tuesday or Thursday?
— _________________
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
—________________ about it now?
—Every time a customer has complained we've followed our store policy and offered them an exchange or a full refund.
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