Before the age of the Internet, we used to ______ our holidays through travel agents.

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问题 Before the age of the Internet, we used to ______ our holidays through travel agents.

选项 A、book
B、having booked
C、booking
D、have booked

答案A

解析本题考查used to do这一结构。如果熟悉used to do这一结构，不难选出正确选项应为选项A。used to do意为“过去常常做……”。

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大学英语三级A级

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