问题
选择题
______ is certain is that Bill will recover from his injury in time for the football match.
A．As
B．It
C．That
D．What
答案
答案：D
考查名词性从句。句中what引导主语从句，在从句中作主语，故选D。
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______ is certain is that Bill will recover from his injury in time for the football match.
A．As
B．It
C．That
D．What
答案：D
考查名词性从句。句中what引导主语从句，在从句中作主语，故选D。