Take your coat with you in case it gets cold later.
Answer: D. in case

John wasn't at work yesterday. He must have been ill.
Answer: A. must have been ill

My father has gone away. He'll be back in a week.
Answer: D. in

The math problem was too difficult for him to work out.
Answer: D. too/to

Most tourists don't visit this part of the town.
Answer: A. Most tourists

What she said made me feel unhappy.
Answer: B. made/feel

I haven't seen her for such a long time that I have forgotten what she looks like.
Answer: D. such a long time

He is the most humorous man that I have ever met.
Answer: C. that

Do you know all the guests invited to the party?
Answer: B. invited

How beautiful she is! She is wearing a pretty purple silk dress.
Answer: D. pretty purple silk dress