单项选择 适中0.65 引用1 组卷39
They can’t do the task this week. They are busy with something else ________these days.
A.since | B.after | C.before | D.during |
2021·河北唐山·二模
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When making clay art pieces, we need to shape them by hand ________ we air-dry them.
A.before | B.after | C.when | D.but |
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