________ of giant pandas is getting _________ because their living areas are becoming farmland.
| A．The number, larger and larger |
| B．A number, larger and larger |
| C．The number, smaller and smaller |
| D．A number, smaller and smaller |
________________ a book in the library, enter a key word into the computer.
| A．To find | B．Find | C．To write | D．Write |
Studying in groups is necessary _________________ you want to do well in school.
| A．if | B．until | C．unless | D．though |
---Whose is the pencil box?
---It ____________ be Tom’s. Look at his name on the cover!
| A．can | B．may | C．must | D．need |
Could you record the football game for me? I can’t watch ____________ later.
| A．it | B．one | C．this | D．that |
Martha is a _______________ girl. She always smiles and says hello to others.
| A．shy | B．friendly | C．crazy | D．healthy |