1.Over a third of the population was estimated _________( 沒有機會享受醫療保健服務)

to have no access to the health service
【解析】本題考查對不定式和have(no)access to的掌握。空格處在句中作主語補足語，不定式變成被動語態以后，都必須加上to have(no)access to意為“(沒)有接近(或進入、享用)的機會”。

2.Surrounded by the police, the kidnappers___________( 沒有選擇，只能當場投降）

had no choice but to surrender on the spot
【解析】本題考查對have no choice but to do及短語on the spot的掌握。have no choice but to do意為“除…之外別無選擇”，注意不要忽略to。on the spot意為“當場”。本句時態應為一般過去時，故用had。

3.The customer complained that___________(他剛啟動這臺計算機) than it stopped working.

no sooner had he started the computer．
【解析】本題考查對no sooner…than句型的掌握。no Sooner…than和hardly(scarcely)…when都表示“剛…?就…”，注意其中連詞的區別。該句型有兩個特點：一是主句中一般使用過去完成時，而從句中一般使用一般過去時；二是no sooner或hardly(scarcely)位于句首時，要求句子采用部分倒裝語序。本句中no sooner位于句首，故句子采用了倒裝語序。

4.The father thought he could ______________(說服女兒改變決定)

talk his daughter into changing her mind/persuade his daughter to change her mind
【解析】本題考查對短語talk sb．into doing sth．或persuade sb．to do sth掌握。兩者都表示“說服某人做某事”，但要注意talk sb．into后接動名詞，persuade sb．后接不定式。

5.The government was accused____________ (沒能實現其改善城市交通狀況的承諾)

of failure to fulfill its promise to improve urban traffic conditions/of failing to fulfill its promise to improve urban traffic conditions ．
【解析】本題考查對accuse的用法及短語fulfill one’s promise to…的掌握。accuse“指責、控告”常用于accuse sb．of sth．/doing sth．結構，所以was accused of之后用failure和failing都可以。“實現…的承諾”用fulfill one’s promise to表示，to后接動詞原形。