EXERCISE 4. CHIA ĐỘNG TỪ TRONG NGOẶC.

8. Tom ( 18 – never do ) ______ any work in the garden: he always ( 19 – work ) _____ on his car. - What he ( 20 – do ) ________ to his car now ? - I ( 21- think ) _______ he ( 22 – polish ) ________ it.