15)Look through the explanations of the phrasal verb to come in your textbook and fill in the missing words to complete the text. The other day while reading an English book I came ... a word I couldn't understand. I looked it up in the dictionary but the word wasn't there. Then I decided to ask for help and called Mike, my good friend. Mike was at home as he had come ... with a cold a few days before. He was glad to help me but asked me to show him the text. I was invited to come ... after work, which I did. Mike met me in the hall. I was taking off my coat and saw that my brooch had come ... it, evidently in the bus or in the street. I went white – the thing was rather expensive and it had been given to me by my granny. Mike saw that my spirits had fallen. "What came ... you?" he asked. I explained. Mike decided to open the door and have a look at the landing. And there it was just in the middle of the doormat.

The phrasal verb "come in" is used in different contexts throughout the text. In each of these contexts, it has a slightly different meaning.

Explanation and step-by-step solution:

1) "I came ... a word I couldn't understand."
Explanation: In this context, "came across" means to find or encounter something by chance.
Solution: I came across a word I couldn't understand.

2) "Mike was at home as he had come ... with a cold a few days before."
Explanation: In this context, "come down with" means to become ill with something.
Solution: Mike was at home as he had come down with a cold a few days before.

3) "I was invited to come ... after work, which I did."
Explanation: In this context, "come over" means to go to someone's place or visit someone.
Solution: I was invited to come over after work, which I did.

4) "I was taking off my coat and saw that my brooch had come ... it, evidently in the bus or in the street."
Explanation: In this context, "come off" means to detach or fall off from something.
Solution: I was taking off my coat and saw that my brooch had come off it, evidently in the bus or in the street.

5) "What came ... you?" he asked.
Explanation: In this context, "come over" means to affect or influence someone emotionally.
Solution: What came over you? he asked.

I hope this explanation helps you understand the meaning and usage of the phrasal verb "come in" in different contexts.