【正文】
wenty years ago twenty years years ago over twenty years ( ) _____ his homework three hours ago. A. finished B. has finished C. is finishing D. is going to finish ( ) cut the big birthday cake _____ small pieces. A. as B. to C. into D. in ( ) he was a child, he was always _______ out new ideas. A. try B. trying C. taking D. tried ( ) you born ______May 21,1974? A. in B. on C. from D. at ( )39。t go to the teacher. A. enough easy B. easily enough C. easy, enough D. very easily ( ) visitors are very ______ to see so many changes _______ in Shenzhen since 1979. A. surprise