in the past few years,they ———many children find their families.a help b will helpc were helpingd have helped

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inthepastfewyears,they———manychildrenfindtheirfamilies.ahelpbwillhelpcwerehelpingdhavehelpedinthepas

in the past few years,they ———many children find their families.a help b will helpc were helpingd have helped
in the past few years,they ———many children find their families.
a help
b will help
c were helping
d have helped

in the past few years,they ———many children find their families.a help b will helpc were helpingd have helped
c