20．Mr．Black is father．（ ）
| A． | Millie and Nick's | B． | Millie's and Nick | ||
| C． | Millie's and Nick's | D． | Millie and Nick |
17．Tom is so careless that he always makes mistakes．Which of the following sentences can NOT be used to remind him to make things better in his exams？（ ）
| A． | Think twice before acting． | |
| B． | Actions speak louder than words． | |
| C． | You can't be too careful． | |
| D． | A miss is as good as a mile． |
16．Most children in poor areas can't ___ their education．We should think about ___ to help them．（ ）
| A． | afford； how we can do | B． | pay； how can we do | ||
| C． | pay for； what can we do | D． | afford； what we can do |
15．What do you think of his speech？
Excellent．It is _______ worth __________．（ ）
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Excellent．It is _______ worth __________．（ ）
| A． | very，listening | B． | well，listening | ||
| C． | well，listening to | D． | very，listening to |