Question

_______ was known to them all that William had broken his promise ______ he woul

_______ 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

Answer 1

答案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。