I had to work extremely carefully, for I didn’t know how long ______ to get used to the new tool.

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问题 I had to work extremely carefully, for I didn’t know how long ______ to get used to the new tool.

选项 A、it would take me
B、it would spend me
C、would it pay me
D、would it cost me

答案A

解析 本题考查It takes sb. some time to do sth.的句型和陈述语序。
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