Here are the completed sentences with the appropriate verb forms:
1.
a) Although it was hard at first, she came to enjoy working for the airline.
b) As I walked through the gate, the dog came racing towards me.
c) After working with her for so long, I came to admire her patience and efficiency.
d) Yesterday, Tom was so late he came downstairs, grabbed a cup of coffee and left.
2.
a) The children were shouting and screaming, but he put up with Frank.
b) We've tried to persuade her to stop, but she just goes on smoking.
c) Dr. Harris welcomed members of the committee and went on to introduce the subject of the meeting.
d) Then, in talking, we said that most of them were ill.
3.
a) I regret to inform you that the item you want is out of stock.
b) We regret to notify you that your request for a tax refund has been rejected.
c) Almost as soon as I posted the letter, I regretted applying for the job.
d) It cost me a fortune, but I don't regret spending a year travelling around the world.
4.
a) Bill was very young when they left, and he could no longer remember living in the house.
b) Do you remember to buy the newspaper on the way home?
c) Remember to check your answers before handing your exam paper.
d) I remember putting the money in the top drawer, but it’s not there now.
Let me know if you need any further assistance!