单项选择题
A. an B. the C. / D. a
Perhaps you ()leave now. Your friend may be waiting for...
单项选择题Perhaps you ()leave now. Your friend may be waiting for you outside.
A. must B. could C. should D. will
Whenever I met him,()was fairly frequent,()I liked his ...
单项选择题Whenever I met him,()was fairly frequent,()I liked his sweet and hopeful smile.
A. which.../ B. that...that C. it...that D. what.../