问题
选择题
He promised to help me and then_________.
A.back out
B.backed out
C.backed of
D.backed on
答案
答案:B
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。
He promised to help me and then_________.
A.back out
B.backed out
C.backed of
D.backed on
答案:B
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。