问题
选择题
Her cousin ______ swim when he _____ six years old.
[ ]
A. can, is
B. could, were
C. could, was
D. can, was
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Her cousin ______ swim when he _____ six years old.
[ ]
A. can, is
B. could, were
C. could, was
D. can, was
答案：C