-Has Tommy finished his homework yet?-I have no idea; he ____ it this morning.
Many people think any government's work should be evaluated ______ on citizens' happiness level.
Growing up _____ be difficult, for you will come across many things that confuse you.
Lee MinHo, _____ music and films are loved by many teenagers, was invited to perform in the 2014 Spring Festival.
If _______, I bet, Milinski will burst into tears.
Shortly after the book Uncle Tom's Cabin________, the Civil War of America________.