Never before had I speak out my mind in public, so when someone asked to sing a song at the party, I felt too ( ) to do so.
A.embarrassed
B.unfortunate
C.unwilling
D.pleasant

单项选择题The foggy morning ( )to be sunny day.A.turned inB.turned outC.turned upD.turned down

单项选择题China is ( ) by the world for its Great Wall.A.known wellB.well knownC.well knowD.well knew

单项选择题Xiao Ming is( )about everything and keeps asking questions.A.stubbornB.interestedC.curiousD.addicted

单项选择题Your words in the opening ceremony is very (

单项选择题More and more people come to realize how important the ecosystem is and ( ) the activities to protect the environment.A.take partB.participate inC.involveD.participate