On top of the hill ______, whose style can be traced to the ages of the Roman Empire.

Something has to be done to stop the rivers from being further polluted,       ?

It was announced that only when the terrible disease was under control _______ to return to their homes.

Find ways to praise your children often, _________ you'll find they will open their hearts to you.

Only when _______ be possible to sign the papers.

I have no idea ______ measures the government will take to stop the river from being further polluted.

How long ______ we take part in the college entrance examination?

I am sure you’d rather he stayed in New Zealand, ______?

In the exam , the__________ you are, the__________ mistakes you’ll make.

Is it he or you ________ in charge of the job and supposed to complete it on time?.