—Listen ! Helen is singing in the next room.
—It __________ be Helen. She is in Tianjin now.
| A．can’t | B．mustn’t | C．may not | D．shouldn’t |
–Mike, shall we watch a cartoon after school?
--________Let’s watch Superman.
| A．Good luck! | B．Never mind. |
| C．Good idea! | D．Don’t worry. |
There is lots of interesting work to do here, so I _____ feel bored.
| A．always | B．often | C．usually | D．never |
--_______ are you going back to London, Tony?
---At the end of July.
| A．How | B．When | C．Why | D．Where |
Thanks to better health care, more people are living _____ lives today than before.
| A．longer | B．richer | C．busier | D．easier |
The Science Museum is popular because people _____ do experiments there.
| A．can | B．must | C．would | D．should |