问题补充:
单选题Hepromisedtohelpmeandthen_________.A.back outB.backed outC.backed ofD.backed on
答案:
B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。
时间:2022-07-11 00:09:23
单选题Hepromisedtohelpmeandthen_________.A.back outB.backed outC.backed ofD.backed on
B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。