`20`. Both my mother and my father are famer (Both N1 and N2 + plural verb: cả ... và ....)
`21`. Both Mo and I like fish
`22`. She killed not only her husband but also her son (not only...but also: không những...mà còn)
`23.` She is not only stupid but also careless
`24`. Neither Tom nor I didn’t go to the party (Neither N1 nor N2 + Verb(N2): không.... cũng không)
`25`. Because (of) + lý do, nguyên nhân = Lý do, so + nguyên nhân: Bởi vì .... nên... = .... nên.....
- Because he was very lazy, he failed the exam
- He was lazy, so He failed the exam