There is no doubt ________ he will succeed.

I made a promise to myself______ this year, my first year in high school, would be different.

It was in the lab, _______ was taken charge of by Mrs Smith, they found the missing necklace.

You can arrive in Guangzhou on time for the fashion show ____ you don’t mind taking the night train. 

Last term our maths teacher set so difficult an examination problem _____ none of us worked it out.