Difficulty: Easy
Correct Answer: By the time
Explanation:
Given data
Concept/Approach
The fixed temporal connector is By the time + clause, not "By such time".
Step-by-step
Replace "By such time" → "By the time you finish that chapter, I will write a letter."
Option analysis
B is correct; A/D are incomplete; C changes reference; E leaves the error.
Final Answer
By the time
Discussion & Comments