21.The bird ______ its wings and flew to the south.
A. beat B. hit C. strike D. struck
22. Dr. Frank failed many times but he finallyto find a successful way to solve the problem.
A. broke off B. broke up C. broke down D. broke through
23. The class is unusual _______ the students are all over fifty and none of them attended the middle school when they were young.
A. in how B. in what C. in which D. in that
2016春鲁教版英语六下Unit 5《How do you get to school》（Section B）ppt课件2
2016春鲁教版英语六下Unit 3《Can you play the guitar》（Section B）ppt课件1
2016春鲁教版英语六下Unit 5《How do you get to school》（Section A）ppt课件1
2016春鲁教版英语六下Unit 2《My favorite subject is science》ppt课件
2016春鲁教版英语六下Unit 5《How do you get to school》（Section B）ppt课件1
2016春鲁教版英语六下Unit 2《My favorite subject is science》ppt复习课件
2016春鲁教版英语七下Unit 8《I’ll help to clean up the city parks》（Period3）ppt课件
2016春鲁教版英语六下Unit 3《Can you play the guitar》（Section A）ppt课件2
2016春鲁教版英语六下Unit 5《How do you get to school》ppt复习课件
2016春鲁教版英语六下Unit 4《What time do you go to school》（Section B）ppt课件
2016春鲁教版英语六下Unit 4《What time do you go to school》（Section B）ppt课件1
2016春鲁教版英语六下Unit 2《My favorite subject is science》（Section A）ppt课件
2016春鲁教版英语七下Unit 7《What’s the matter》（Section B）ppt课件
2016春鲁教版英语六下Unit 2《My favorite subject is science》（Section A）ppt课件1
2016春鲁教版英语六下Unit 4《What time do you go to school》（Section A）ppt课件
2016春鲁教版英语六下Unit 4《What time do you go to school》ppt课件
2016春鲁教版英语六下Unit 4《What time do you go to school》（Section A）ppt课件2
2016春鲁教版英语六下Unit 10《Is there a post office near here》（Section A）ppt课件3
2016春鲁教版英语六下Unit 2《My favorite subject is science》（Section A）ppt课件2
2016春鲁教版英语七下Unit 8《I’ll help to clean up the city parks》（Period1）ppt课件
2016春鲁教版英语六下Unit 2《My favorite subject is science》（Section B）ppt课件1
2016春鲁教版英语六下Unit 5《How do you get to school》（Section B）ppt课件
2016春鲁教版英语六下Unit 2《My favorite subject is science》（Section B）ppt课件2
2016春鲁教版英语六下Unit 3《Can you play the guitar》（Section B）ppt课件2
2016春鲁教版英语七下Unit 7《What’s the matter》（Section B）ppt课件1
2016春鲁教版英语六下Unit 4《What time do you go to school》（Section B）ppt课件2
2016春鲁教版英语六下Unit 5《How do you get to school》（Section A）ppt课件2
2016春鲁教版英语六下Unit 10《Is there a post office near here》（Section A）ppt课件
2016春鲁教版英语六下Unit 10《Is there a post office near here》ppt课件
2016春鲁教版英语七下Unit 8《I’ll help to clean up the city parks》（Section A）ppt课件