Question

Kate was not sure_______.

1. A.
   that she should go through the third gate
2. B.
   if she should go through the third gate or not
3. C.
   which gate should she go through
4. D.
   which gate she should go through

Answer 1

D
此題重點考查單詞sure的基本用法。sure用作形容詞，意為“肯定的；當然的；有把握的”。 常用的句型結構有
1. be sure（不接其它詞），意為“肯定的”。
2. be sure to do sth. 表示要求，意為“務必做某事；請一定做某事”，多用于祈使句。例如：
3. be sure of / about (doing) sth. 表示人對某事（物）的看法，意為“對……有把握”。其后常接名詞、代詞或動詞-ing形式。
4. be sure+從句，意為“確信”。