He went there, _____ some books and call on an old friend of his.
| A．bought | B．buying | C．buy | D．to buy |
Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
| A．needn't | B． don't | C．mustn't | D．can't |
Of all the methods they provided, ______ is of any help for solving the math problem.
| A．nothing | B．neither | C．none | D．no one |
—Tom seems to be familiar with London.
---Yes. He ___________ here for three years. It’s great for him to be back.
| A．have lived | B．had lived | C．lived | D．lives |
A modern city has been built _____ a very small village was many years ago.
| A．what | B．where | C．that | D．in which |
---There’s someone knocking on the door. Who _________ it be?
---It must be John. He promised to be here at 8:00.
| A．must | B．can | C．need | D．shall |