_______ was known to them all that William had broken his promise ______ he would give each of them a gift.
A. As; Which B. What; that C. It; that D. It; which
_______ was known to them all that William had broken his promise ______ he would give each of them a gift.
A. As; Which B. What; that C. It; that D. It; which
C
第一空填 it，为形式主语；第二空填that，用以引导一个同位语从句，修饰 promise。