改错:If they don't finish their homework,they work till finish it.A.改 don'tB.改 theirC.改后一句的workD.改后一句的finish_____

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改错:Iftheydon''tfinishtheirhomework,theyworktillfinishit.A.改don''tB.改theirC.改后一句的workD.改后一句的finish_____

改错:If they don't finish their homework,they work till finish it.A.改 don'tB.改 theirC.改后一句的workD.改后一句的finish_____
改错:If they don't finish their homework,they work till finish it.
A.改 don't
B.改 their
C.改后一句的work
D.改后一句的finish
_____

改错:If they don't finish their homework,they work till finish it.A.改 don'tB.改 theirC.改后一句的workD.改后一句的finish_____
选C~
If they don't finish their homework,they will work till finish it.
IF 引导的从句,条件句是一般现在时态,主句就应该是将来时态~