Unless the police can prove to the court that Ted has committed robbery,he______.

As time__________, she became more and more anxious about  her son’s safety. 

---Are you still busy?---Yes, I ____ my work, and it won’t take long.

The student’s behavior cost the teacher a steepless night . He never thought his student ______ computer games for a whole class . 

The president hopes that the people will be better off when he quits than when he      .