Volunteering is becoming ______ popular in China —- Yeah People are now aware that helping others is helping themselves

There were two boys in the lab, did the experiment successfully.

I can’t find my dictionary. —_____worry about your lost book. You can use _____.

The teacher explained the question clearly to ______hisstudent _____ its importance.[ ]

r you__________at Smith’s— Yes, I__________there for about threemonths