.
Service was included in the bill, so you _______ the waiter. It was a waste of money.
| A．will not tip | B．may not tip | C．needn't have tipped | D．mustn't have tipped |
Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.
| A．when | B．while | C．after | D．before |
________ from what she said at the meeting, she must have lied to all of us.
| A．Judged | B．Judging | C．To judge | D．Judge |
Some experts believe it is the grandparents who ________ for the spoiled child.
| A．are to blame | B．are to be blamed |
| C．should blame | D．are blamed |
--- Let’s go shopping, shall we?
--- Wait a minute. I ________ my housework and it won’t take long.
| A．just finish | B．am just finishing |
| C．have just finished | D．am to finish |
It’s more than half a century ________ my grandfather joined the Party and became a servant to the people.
| A．since | B．that | C．when | D．while |