The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.
If it were not for the fact that you _____ ill, I would ask you to do this right now.
--- “Where have you been?” --- “I got caught in traffic; otherwise _____ sooner.”
We _____ the work on time without your help.
You _____ such a serious mistake if you had followed his advice.
If only I _____ my watch!