单项选择题
Whenever I met him, () was fairly frequent, () I liked his sweet and hopeful smile.
A. which; 不填 B. that; that C. it; that D. what; 不填
单项选择题 I don't know what illness he suffered from, but I do remember he mentioned ()in hospital last year.
单项选择题 () they will send us an invitation is not yet known, () we hope they sill.
单项选择题 A fireman discovered the () of the fire.
