Scientists say they have found a way to produce the human body's own cancer-killing cells through gene treatment, ______ new hope to cancer sufferers.

单项选择题—Thank you so much for the lovely evening, Dennis. —You're quite welcome, Julie. ______. We'd been looking forward to seeing you.

单项选择题My brother is very tall. The little bed won't ______ for him.

单项选择题“建国君民，教学为先”这句话反映了______的关系。

单项选择题Though I ______ to go abroad, I changed my mind and decided to stay with my family.

单项选择题教育行动研究又称为______。