Grammar Tense Completion
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2. When first humans ---- to make fire, they ---- capable of altering their environment. A) learn / have become B) are learning / will become C) have learnt / become D) learnt / became E) were learning / had become
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Hi Bahattin, let's solve this grammar quest together by looking at the sentence structure and time indicators.
Analyzing Sentence Tense
The sentence starts with 'When first humans', which clearly refers to a specific, completed period in the distant past.
Context: Historic Past Event
Since we are talking about prehistoric times, we need both verbs to be in the simple past tense to describe a sequence of completed actions.
Rule: Simple Past + Simple Past for consecutive past actions.
Let's look at Option A. 'Learn' is present and 'have become' is present perfect. These don't fit a finished historic event.
Option B uses the present continuous and future tense, which implies something happening now or later, not in the past.
Option C uses the present perfect and present simple. Again, this doesn't match a completed historical narrative.
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