Choose the sentences with the correct order

VII. Choose the sentences with the correct order.
1. by/ is/ only/ travelling/ convenient/ air/ but/ not/ also/ fast.
A. Travelling by air is only not convenient but also fast.
B. Travelling by air is not only convenient but also fast.
C. Travelling by air is not only convenient but fast also.
D. Travelling by air is not convenient but only also fast.
2. do/ in/ think/ will/ you/ appear/ the/ flying/ year/ trains/ 2100?
A. Will you think flying trains do appear in the year 2100?
B. Do you will think flying trains appear in the year 2100?
C. Do you think flying trains will appear in the year 2100?
D. Do you think flying trains will in the year 2100 appear?