The teacher usually says “You are _____________(解散)” at the end of each lesson.

To get full marks in the exam is really a c_________ task for little Jack.

Bill Gates _________ (捐赠) lots of money to poor people every year.

Their b____    _towards me shows that they are not satisfied with me.

We made a c            experiment in the science class. It was so interesting.

Teaching the children with disabilities is a c           job.

Was the Great Wall first built from the Qin             (朝)？

They are having a heated                (争论) over whether smoking is bad for the health.

Tom d________ the gold medal in the speech competition as he had made so many efforts that hardly could anybody imagine.

City people want to be outdoors on the weekend and do something ______(挑战性的)