答案：
练习一
1. voiced 2. facing 3. myself 4. marked 5. in
6. activities 7. suggests/suggested/has suggested 8. where
9. who/that 10. meaningful
练习二
1. in/during 2. fills 3. slowly 4. was invited 5. To calm
6. asked 7. hands 8. joining 9. yourself/yourselves
10. what
练习三
1. reached 2. successful 3. height 4. from 5. freshly
6. going 7. has worked 8. how 9. a 10. released
练习四
1. be known 2. called 3. which 4. independently 5. us
6. got 7. trends 8. have chosen 9. growth 10. higher
练习五
1. which 2. burning 3. simply 4. are kept 5. called
6. animals 7. and 8. looks 9. to find 10. An
练习六
1. will take 2. to offer 3. which 4. their 5. got
6. while 7. oldest 8. arranged 9. meters 10. was named
练习七
1. where 2. amazed 3. Seeing 4. On 5. landed
6. successfully 7. will send 8. was held 9. the
10. to connect/connecting
练习八
1. gave 2. to hand 3. puzzled 4. foods
5. have been enjoying/have enjoyed 6. are found 7. them 8. but
9. happier 10. which
练习九
1. takes 2. a 3. was having 4. older 5. eating
6. uncomfortable 7. with 8. what 9. to hear 10. is celebrated
练习十
1. persuaded 2. my 3. successful 4. where 5. Studies
6. trying 7. is considered/has been considered 8. in 9. easily
10. designed
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