正确答案: A

must have been

题目：It（）aroundsixo’clockwhenIdrovebackyesterdaybecauseitwasalreadydark.

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学习资料的答案和解析：

[单选题]As the goods ____ within the scope of our business activities, please contact us immediately.

fall

[单选题]We shall advise you ____ we are able to supply the goods again.

as soon as

[单选题]_____ we appreciate your counter-offer, we your prices too low to be acceptable.

While

[单选题]We will（）you as soon as the new crop comes to the market.

contact

[单选题]We will consider（）your terms of payment.

accepting

[单选题]Please let us know what（）are involved and the time（）for delivery.

formalities，taken

[单选题]When the good sare ready，the shipping agent will（）and（）them to the docks.

collect，deliver

[单选题]（）crowded orders；we have sold out all the goods scheduled for shipment with in this year.

As a result of

[单选题]Our annual sales revenue has（）since we began international trade.

quadrupled