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Researchers ______ a cure yet.

The relationship ______ teachers and students affects motivation.

While the ship ______, the stern broke in two.

The WTO ensures that countries enforce ______ tariffs.

Minor collisions between ships and icebergs ______ still common today.

Most manufacturing operations aim to increase the ______ of goods.

This test contains two types of questions: multiple choice and error correction. For multiple choice questions, simply select the correct answer for the blank. For error correction questions, write in the box the underlined phrase that contains an error, and also write the correction for it.

18. What are the two rules that a binary tree must abide by?

13. What is the largest number of comparisons for searching the following Binary Search Tree?

16. Given the list (27, 40, 15, 25, 10, 19, 30), what are the new partitioned lists if the pivot is 25?