match each word to the syllable with schwa /ə/. 

`5` . `a` 

`-` control / kənˈtrəʊl/ `->` /ə/ in the first syllable 

`6` . `c`

`-` technology /tekˈnɒləʤi/  `->` /ə/ in the third syllable

`7` . `b` 

`-` problem /'prɒbləm/ `->` /ə/ in the second syllable

`8` . `b`

`-` scientist /ˈsaɪəntɪst/ `->` /ə/ in the second syllable

`9` . `a` 

`-` machine /məˈʃiːn/ `->` /ə/ in the first syllable 

`10` . `b` 

`-` treatment /ˈtriːtmənt/ `->`/ə/ in the second syllable

`a - 5, 9` 

`-` control /kənˈtrəʊl/ (v): điều khiển

`-` machine /məˈʃiːn/ (n): máy móc

`->` schwa /ə/ in first syllable

`b - 7, 8, 10` 

`-` problem /ˈprɒb.ləm/ (n): vấn đề

`-` scientist /ˈsaɪ.ən.tɪst/ (n): nhà khoa học

`-` treatment /ˈtriːt.mənt/ (n): sự đối đãi

`->` schwa /ə/ in second syllable

`c - 6` 

`-` technology /tekˈnɒl.ə.dʒi/ (n): công nghệ

`->` schwa /ə/ in third syllable