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.../

相关考题

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