Sometimes ____ you know you've done something wrong and you feel bad about it, it takes courage to say sorry.
A. once
B. only if
C. unless
D. even though
参考答案:
— Will you go to attend her wedding? — No, _____ invited to..
— Will you go to attend her wedding? — No, _____ invited to.A. as if B. even if C. if D. whether