1. The teacher _keeps track_ on each student's performance every day and send it to their parents
2. I've _researched_ on the Internet to find out the cheapest way of travellin there
3. I was afraid that I couldn't _meet the deadline_, so I asked by boss for extension
4. If you want everything to go on the right track, you have to _plan_ carefully
5. The science teacher assigned each child to _prepare a presentation_, which would be presented in front of the entire class.
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