He volunteered to work in a remote mountainous village in West China last year, which is still _____ on foot now.

—— Mum, I think I’m ＿＿＿＿＿ to get back to school. —— Not really, my dear. You’d better stay at home for another day or two. 

 It was a _______story, and we all got ________.

The first African-American president of the United States received a（n） _____ welcome in the African countries, where he was received as a returning son．

Evidence has been found through years of study that children’s early sleeping problems are _______ to continue when they grow up.