10) a) walks, b) took
11) a) makes , b) think c) look
12) drinks
13) a) doesn't want b) doesn't have
14) a) wear, b) wear
15) a) on't understand, b) explains
16)works
17) works
18) a) does b) cook c) smells
19) a) lives , b) write
20)a)spends , b) prefers
