______until recently, people who are left-handed have been considered abnormal.

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问题 ______until recently, people who are left-handed have been considered abnormal.

选项 A、Up
B、Unless
C、Down
D、Not

答案A

解析 句意:一直到现在为止,左撇子仍被视为不正常。up until一直到…为止。unless,down不与until搭配。 not until直到…才,一般分开使用。如:Tom did not come until3 o’clock.
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