she heard a continual strange noise coming from the next room.her heart ___ fast.A beat B beats C beating D beatenshe heard a continual strange noise coming from the next room,her heart ___ fast.

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she heard a continual strange noise coming from the next room.her heart ___ fast.A beat B beats C beating D beatenshe heard a continual strange noise coming from the next room,her heart ___ fast.
she heard a continual strange noise coming from the next room.her heart ___ fast.
A beat B beats C beating D beaten
she heard a continual strange noise coming from the next room,her heart ___ fast.

she heard a continual strange noise coming from the next room.her heart ___ fast.A beat B beats C beating D beatenshe heard a continual strange noise coming from the next room,her heart ___ fast.
room后面的标点符号是句号的话,选 A,beat 为过去式
room后面的标点符号是逗号的话,选 C,现在分词短语表伴随状态.

如果是句号连,选B
如果是逗号连,选C

B
她听到从隔壁房间穿来奇怪的声音,她的心跳的很快。

A......动词的过去式和分词都是一样的