I can’t find my purse anywhere.—You __ have lost it while shopping.

(2013·高考江西卷)Only when he apologizes for his rudeness________to him again.

下列各句中，没有语病的一句是（ ）

_______seems to have been a strong competition inChina for school leavers to enter college or university.

Howdid it _____ that you made such a silly mistake—I myself haven’t figured it out yet.