To start the experiment, you need to ________ air into the balloon.
Please ________ the end of the balloon so the air doesn't escape.
If you ________ a balloon on your jumper, it gets a negative charge.
Before you peel the egg, you must ________ it for four minutes.
________ the bottle in a towel and shake it well.
Be careful when you ________ the hot water into the glass bottle.
To mix the ingredients properly, you need to ________ the container for a minute.
First, ________ the glasses with water to the very top.
We need to ________ out an experiment to see if the theory is correct.
I can't ________ out the answer to this difficult maths question.
If you ________ up 15 and 10, you get 25.
The scientists were lucky the lab didn't ________ up during the accident.
Please ________ up the paper into small strips for the project.
I need to ________ up the total number of students in the class.
It's difficult to ________ out how the machine works without instructions.
The teacher asked us to ________ out the task in pairs.
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