【2015·湖南】He must have sensed that I ________ him. He suddenly glanced at me and said quietly, "Why are you staring at me like that?"
— I must apologize for _____ ahead of time. — That’s all right.
The couple decided to _____ another two children who lost their parents in the disaster.
Being too about your food is not good for your health.
Tom has _____ good knowledge of English and this will improve his chance of finding _____ proper job.
In many countries, some scientists are already _______ research in order to produce a cloned human baby.