_____ about the safety of her son, John’s mother looked upset．

________ at the golden belt of Yangtze River Delta, Ma'anshan is the National Garden city _______ wonderful landscape appeals to many visitors every year.

Jack, who claimed ______ everything clearly, however, he told a lie.

 The chair looks rather hard, but in fact it is very comfortable to _______.

I’m sorry I can’t help ____ the flowers, because I’m busy preparing for the singing competition ____ tomorrow.