两道英语选择题，选什么？理由？

The children cheered up when they saw hundreds of colorful ballons _______ slowly into the sky.
A) floating B) raising C) heaving D) ascending
For many patients, institutional care is the most _______ and beneficial form of care.
A) persistent B) appropriate C) thoughtful D) sufficient

两道选择题...要有理由... 两道英语选择题 英语两道选择题 两道英语选择题? 两道英语选择题! 英语选择题两道 物理问题（两道选择题，理由） 请教几道英语选择题,说明理由 几道英语选择题，请说明理由 三道英语选择题。。要理由(3)