Choose the word or pharse(A,B,C,D) that is not correct in standard English
1. The building used to being a library but now it is a cafe
A B C D
2. Please tell him what he should to do to improve his writing skill
A B C D
3. He asked me take the files to the office as soon as possible
A B C D
4. Some students in my class learn English in a quickly way
A B C D