Now that we are done unpacking, we need to ________ all the boxes. (make flat) flatted flatted flatten flat + en = flatten. Note that we had to add an extra 't'. 7. I think you should __________ your knife, so it will be easier to cut the meat. (make sharper) sharpen shapen sharpener
. Before you take the photo, I need to __________ up my make-up. 
(make fresher)- freshen
- fresher
- enfresh
fresh + en = freshen
2. Before he started painting, the artist __________ the canvas. 
(made blacker)- blacken
- blackened
- blackend
The past tense of the verb "blacken" was needed in this sentence. black + en + ed = blackened
3. We need to find a way to __________ the cardboard to make the signs for the demonstration. 
(make stiffer)- stiffer
- stiffen
- stiffs
stiff + en = stiffen
4. You need to __________ your reading to have more general knowledge. 
(make broader)- enbroad
- broadened
- broaden
broad + en = broaden
5. Come on, __________ up! If you plan your time better, you will get a lot more studying done every day. 
(become smarter)- smaten
 
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