2．likely; probable; possible 表示“可能”， likely> probable > possible；likely既可修饰物，也可修饰人;主语可以是it或sb/sth。probable和possible只能修饰事物。

The USA ___________carry out another attack on Syria with the excuse of supporting democracy．

is likely to

It’s possible but not probable/ likely that he will stick to his incorrect proposal．

If you are in the tenth grade, how old _____ you ______ _____ be?

are

likely to