句子写作：Iwasveryembarrassed.Ididn’tknowwhatIshoulddo.
_______isknowntoall，Chinawillbean_______powerfulcountryin20or30years’time.
Howmanypartsdoesascienceandtechnologypaperconsistof?Whatarethey?
句子写作：Thejudgehadahardtimedeciding___________________.
句子写作：Thepianoplayerbegantosingloudly.
