20.American women usually identify their best friend as someone ____ they can talk frequently.
Whenever our friends come to see us, my parents will take them to the Shuihui Park and the Dinghui Temple, ______Rugao is famous in the country.
Witnessing the explosion(爆炸) in a chemical plant in Kunshan is the most frightening experience ______ I have ever had.
--- Is this company ______ your elder sister once worked in? ---- Yes, it is.
---What are you reading, Dad? --- I’m not really reading, just ______ the pages.
The mother watched her child playing on the beach, ________ in front of her chest.