(As is known) to all, sometimes it is very (difficult) to (tell) the difference between technical English (from) everyday Englis

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问题 (As is known) to all, sometimes it is very (difficult) to (tell) the difference between technical English (from) everyday English.

选项 A、As is known
B、difficult
C、tell
D、from

答案D

解析 表示在两者之间用between...and...。
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