The picture shows us _______ in Nanjing in the past.

If it had not been for your help, I ____the examination.

I have heard you are going to change your job. Are you serious?—_______. I will quit my job.

What field will your son go into after graduation from Nanjing University?— I’m not quite certain, but he ________ a good teacher of English.[ ]

____you study,____ grades you will get.