It would be ( )that such an honest man shuold have betrayed

It would be ( )that such an honest man shuold have betrayed his friends .（ ）中应填什么
还有第二提 Don not let yourself ( ) into buying things you don not want.
第三题This book( )to me .It is mine
第四题She has set a new record ,that is ,the sales of her lates book ( )50 million copies.
以上四题在 belong ,reach,persuade,encourage,believe,injure,whom,determine 中选择 一定要确定