Modals again.

Dear experts,

Could you please correct these uses of modals?

I'm trying to fill in the blanks with a suitable modal.

1) I am tired out. I should go (go) to bed earlier than I did.

2) I should water (water) my house plants more than I did. I should give (give) them better care.

3) I had to get (get) to the meeting on time, but my bus was late. I should have taken (take) a taxi.

4) Tom and my sister shouldn't have got (get) married. They never got along before they were married, and now it's even worse.

5) I caught a bad cold. I shouldn't have gone (go) outside without a jacket. I shouldn't have taken (take) a walk in the rain.

6) The experiment was a flop. I must have had (have) the wrong formula.

7) I have a little bit of a stomach ache. I may have eaten (eat) something bad. I may have drunk (drink) polluted water.

8) The children didn't enjoy the animal film. It may have been (be) too difficult for them. They may have been (be) tired.

9) I was calling him all day, but I always got a busy signal. His phone may have been (be) out of order. The receiver may have been (be) off the hook. Otherwise, I may have (have) the wrong number.

10) They didn't get my letter. I may have forgotten (forget) to put a stamp on it, but I don't think so. I may have used (use) the wrong address, but I doubt it.

11) Life must have been (be) better seventy-five ago, but it's hard to say because were few taxes, it must have been (be) better for the rich.

12) He won every game when we played cards the other night. He may have cheated (cheat), but it's hard to believe. He may have been (be) lucky and may have got just (get,just) good cards.

13) Why haven't they come to yet? Well, they may have missed (miss) the bus, or they may have forgotten (forget) the date. Who knows?

14) I'm sorry, but I'm afraid you're wrong! That writer can't have written (write) this book; he'd already been dead for 30 years when the book was published, and the book is about current events.

15) The pilgrims must have thrilled (thrill) when their ship, the Mayflower, first landed in the New World

16) I haven't received an answer from my girlfriend yet, and it's been two months now, She can't have liked (like) it. I may not have said (say) the right thing. I should have explained (explain) myself clearly.

17) Unfortunately, he doesn't have any money now. He should have thought (think) more about his future when he was younger and able to work hard.

18) When our daughter was little girl, she used to (play) house and used to (eat) pineapple for breakfast every morning.

Thanks a lot. I'm sorry for the prolonged post.