Kathy has wasted so much time playing,  ___failing in the exam.

 That night I felt especially lazy and went to bed ____ earlier than usual.

When Helen saw her tutor nod ______ to her, she calmed down and went on with her performance .

It is very ___that the factory will have to close because the economic crisis . 

Though many extra trains and buses are used to carry passengers, traffic tools are still ________ needed during the Spring Festival.