16. Whenever we hear of a natural disaster, even in a distant part of the world,
a b
we feel sympathy for the people having affected.
c d
答案： D
解析： 人被（災(zāi)難）所影響，應(yīng)該用被動(dòng)語態(tài)，應(yīng)改為: having been affected.
17. Mary said her mother would buy her a five-speeds racing bicycle for her sixteenth
a b c d
birthday.
答案： B
解析： 有短橫線連接的形容詞不用復(fù)數(shù)形式，應(yīng)該改為five-speed.
18. I have lost so much weight recently so all my clothes are too big; I must have
a b c
them taken in.
d
答案： B
解析： 改為：that.
19. Even though he had been studying English for three years before he came to a b c
England, it is still difficult for him to make himself understand.
d
答案： D
解析： 盡管他在去英國之前已經(jīng)學(xué)了三年的英語了，但要?jiǎng)e人明白他依然是有困難的。這里他是被人聽懂，理解的，所以要用被動(dòng)語態(tài)，故D項(xiàng)改為： understood.
20. His paper contains less mistakes than ours.
a b c d
答案： B
解析： B項(xiàng)改為：fewer; 因?yàn)閘ess修飾不可數(shù)名詞, 而修飾可數(shù)名詞應(yīng)該用：fewer, 用比較級，因?yàn)楹竺嬗胻han, 有比較對象.
a b
we feel sympathy for the people having affected.
c d
答案： D
解析： 人被（災(zāi)難）所影響，應(yīng)該用被動(dòng)語態(tài)，應(yīng)改為: having been affected.
17. Mary said her mother would buy her a five-speeds racing bicycle for her sixteenth
a b c d
birthday.
答案： B
解析： 有短橫線連接的形容詞不用復(fù)數(shù)形式，應(yīng)該改為five-speed.
18. I have lost so much weight recently so all my clothes are too big; I must have
a b c
them taken in.
d
答案： B
解析： 改為：that.
19. Even though he had been studying English for three years before he came to a b c
England, it is still difficult for him to make himself understand.
d
答案： D
解析： 盡管他在去英國之前已經(jīng)學(xué)了三年的英語了，但要?jiǎng)e人明白他依然是有困難的。這里他是被人聽懂，理解的，所以要用被動(dòng)語態(tài)，故D項(xiàng)改為： understood.
20. His paper contains less mistakes than ours.
a b c d
答案： B
解析： B項(xiàng)改為：fewer; 因?yàn)閘ess修飾不可數(shù)名詞, 而修飾可數(shù)名詞應(yīng)該用：fewer, 用比較級，因?yàn)楹竺嬗胻han, 有比較對象.