39_______ is certain, people’s living conditions in China have improved a lot since the 1980s

on the top of the mountain is an ancient tower dating back to hundreds of years ago .

I hope Lily will come to see me before she .

一Haveyou mended your shoes，Bob 一Yes, I ______ them twenty minutes ago.

Babara is easy to recognize as she’s the only one of women who ____evening dress.