Things are ________ on Mars ________ on Earth because of the different gravity.

The old man never fails to help___ is in need of his help.

Gelivable (给力) has becomehot word this year.

If Tony ______ his dad that he’s lost the camera, he’ll be punished.[ ]

It’s going to rain. Let me fetch an umbrella for you.—Thank you! You are so ________.