语法与词汇 22.Although Tom is satisfied with his academic achievement, he wonders ______ will happen to his family life .
【正确答案】 C
【答案解析】后半句中he是主语，wonder是谓语，后面是宾语从句。这个宾语从句中缺少主语(sth)。用what在意思上补齐。