Question

Kate was not sure_______.

A. that she should go through the third gate

B. if she should go through the third gate or not

C. which gate should she go through                

D. which gate she should go through

Answer

D

【解析】此题重点考查单词sure的基本用法。sure用作形容词，意为“肯定的；当然的；有把握的”。 常用的句型结构有

1. be sure（不接其它词），意为“肯定的”。

2. be sure to do sth. 表示要求，意为“务必做某事；请一定做某事”，多用于祈使句。例如：

3. be sure of / about (doing) sth. 表示人对某事（物）的看法，意为“对……有把握”。其后常接名词、代词或动词-ing形式。

4. be sure+从句，意为“确信”。