They are_______hard to higher marks in the final exams.(work)为什么填working?

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They are_______hard to higher marks in the final exams.(work)为什么填working?

They are_______hard to higher marks in the final exams.(work)为什么填working?
They are_______hard to higher marks in the final exams.(work)
为什么填working?

They are_______hard to higher marks in the final exams.(work)为什么填working?
working
因为有are,be动词后面要加ing

working

working
因为are后面用现在进行时

working

They are_______hard to higher marks in the final exams.(work)为什么填working? they they they They they books are____(they) They.,did they?(造句) They They need light here they here they Here they they复数 They have they单数 they宾格 what()they()they()there?what()they()they()there?[do] They like They are