—Hi, Mary. __________?

—Not so well. I can’t keep up with the other students.

A．How long have you studied chemistry

B．Who is teaching you chemistry

C．How is your chemistry study going

D．Where are you learning chemistry

---________ have you studied in this school?

--- For about two years.

A．How often         B．How long          C．How much         D．How many

---_____ have you studied English?   --- Since I was six.

— How long have you studied English?  

— ______.

---________ have you studied in this school?
--- For about two years.