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_______ the white page with a black pastel.
 
The sky will ________ when the sun comes out.
 
_______ the boxes before putting them into the bin.
 
I decided to ________ my holiday by an extra couple of days.
 
It occurred to the teacher that she might have been ________.
 
Mr Bell said '__________ your tie'.
 
I need to _______ my jeans by one centimetre.
 
The recipe said to _______ the cream by whisking it.
 
_______ your seat belt please.
 
If you _______ something you make it stronger.