1．(2018·全国卷Ⅰ)Two of the authors of the review also made a study published in 2014 showed a mere five to 10 minutes a day of running reduced the heart disease and early deaths from all ________(cause)．
[解析] 考查名词。此处cause是可数名词，意为“原因”，句中的all表示“所有”，后应用可数名词的复数形式，故填causes。
[答案] causes
2．(2018·浙江卷)Making Chinese ________(dish) is seen as especially troublesome.
[解析] 考查名词单复数。dish是可数名词，其前无限定词，故用其复数形式dishes。
[答案] dishes
3．(2017·全国卷Ⅲ)She has turned down several ________(invitation) to star at shows in order to concentrate on her studies.
[解析] 考查名词复数。根据句意可知Sarah已拒绝了好几个邀请，前面有several修饰，故用invitation的复数形式。
[答案] invitations
