注：以下答案为网友提供，仅供参考。

1 Mary has

　　综合A：1 Mary has blended... A mixed

　　2 They agreed to... B change

　　3 The economy continued...C show

　　4 A notably short...C remarkably

　　5 The dentist has...A take ou

　　6 It is absurd ...A ridiculous

　　7 A lot of people ... B polluted

　　8 The room.... C dark

　　9 The index is the...A measure

　　10 It’s prudent ...B sensible

　　11 He is renowned...D well-known

　　12 You have to be patient ...A maintain

　　13 She stood there... D shaking

　　14 Medical facilities ...C improved

　　15 Mary looked...D exhausted

　　16 Japan has...A Right

　　17 Russia was...A Right

　　18 All African countries...B Wrong

　　19 The Soviet Union...B Wrong

　　20 Australia is one...C Not mentioned

　　21 China did ...A Right

　　22 Many high ...C Not mentioned

　　23 Paragraph 2 B Inte