Give the correct form of words in brackets.
15. Sometimes my jokes (annoying) ______ them.
16. The family are making (arrange) ______ for his weeding.
17. (Lucky) ______, it rained heavily so we had to stay at home.
18. Khang is also extremely (generosity) ______.
1 annoys
2 arrangement
3 Unluckily
4 generous