Why not _____to the park now ?
---Good idea! Let’s go
| A．go | B．to go | C．goes | D．going |
Let’s stop _______ a rest. I am so tired.
| A．having | B．to have | C．having | D．had |
We must do everything what we can _______ water and paper.
| A．save | B．saving | C．to save | D．saved |
My sister got a beautiful present on her ________ birthday.
| A．fiveth | B．five | C．the fifth | D．fifth |
It's a good idea ______ breakfast every day.
| A．had | B．have | C．has | D．to have |
Look at the new words. Please ______ in your notebook.
| A．write it down | B．write down it |
| C．write them down | D．write down them |