1 ea: healthy/heart/pleased/hear/wear/heard
2 ai: air/bargain/rain
3 ia: brilliant/reliable/marriage
4 ie: friend/believe
5 ei: receipt/ either
6 ou: colouful/course/found/couple
7 ue: value/unique/guess
8 ua: quality/guarantee/sensual/gradually/language
9 ui: suitable/suite/tuition/building

Difficult sounds:
/ð/ /θ/ /ʧ/ /ʃ/ /ʤ/ /ʒ/
Look at the pairs of words. Try to pronounce them. Transcribe the words:

three/free, ten/then, sink/think, clothes/close, dirty/thirty, worth/worse, van/than, thank/sank, mouth/mouse, bread/breath, debt/death, thick/sick, those/toes, dare/there, fought/thought

healthy /ˈhɛlθi/heart /hɑːt/pleased /pliːzd/hear /hɪə/wear /weə/heard /hɜːd/air /eə/bargain /ˈbɑːgɪn/rain /reɪn/brilliant /ˈbrɪljənt/reliable /rɪˈlaɪəbl/marriage /ˈmærɪʤ/friend /frɛnd/believe /bɪˈliːv/receipt /rɪˈsiːt/either /ˈaɪðə/colourful /ˈkʌləfʊl/course /kɔːs/found /faʊnd/couple /ˈkʌpl/value /ˈvæljuː/unique /juːˈniːk/guess /gɛs/quality /ˈkwɒlɪti/guarantee /ˌgærənˈtiː/sensual /ˈsɛnsjʊəl/gradually /ˈgrædjʊəli/language /ˈlæŋgwɪʤ/suitable /ˈsjuːtəbl/suite /swiːt/tuition /tju(ː)ˈɪʃən/building /ˈbɪldɪŋ/three /θriː/  - free /friː/ten /tɛn/ - then /ðɛn/ sink /sɪŋk/  - think /θɪŋk/clothes /kləʊðz/ - close /kləʊs/ или /kləʊz/dirty /ˈdɜːti/ - thirty /ˈθɜːti/worth /wɜːθ/ - worse /wɜːs/van /væn/ - than /ðæn/mouth /maʊθ/ - mouse /maʊs/ или /maʊz/bread /brɛd/ - breath /brɛθ/debt /dɛt/ - death /dɛθ/thick /θɪk/ - sick /sɪk/those /ðəʊz/ - toes /təʊz/dare /deə/ - there /ðeə/fought /fɔːt/ - thought /θɔːt/