He promised to help me and then.A. back outB. backed outC. backed ofD. backed on

发布时间：2020-08-16 18:41:50

He promised to help me and then    .
A. back out
B. backed out
C. backed of
D. backed on

网友回答

A. back out
(答案→)B. backed out
C. backed of
D. backed on
解析：词义辨析。back out不遵守诺言；backed of在……后边；backed on背靠。句意：他许诺了帮助我，然后又反悔了。根据句子谓语promised，所以用一般过去时，选B。
以上问题属网友观点，不代表本站立场，仅供参考！