It’s more_______ to climb the tall tree, be careful.
| A．danger | B．dangerous | C．busy | D．difficult |
Thank you very much for __________ us so well.
| A．teach | B．teaching |
| C．teaches | D．thought |
Tom and Mary _______ to China last month.
| A．come | B．came | C．comes | D．coming |
--- What’s the use of this kind of fuel(燃料) ?
--- It can make the train __________ fast.
| A．to go | B．going | C．went | D．go |
---Help yourself to some chicken , Jim . ---__________________
| A．Yes , please | B．You are welcome |
| C．Thank you | D．Yes , all right |
In our class, Andy is the __________ . He always makes everybody laugh .
| A．taller | B．shy |
| C．quietest | D．funniest |