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Read the astronaut's desperate radio transmission to Houston. Select ALL the sentences that correctly describe their situation using mixed conditionals!
Houston, we have a problem. I forgot to pack the instruction manual before launch, and now I'm pressing buttons at random.
The correct answers are If I had packed the manual, the ship's alarm wouldn't be blaring right now. and I wouldn't be guessing which button to press if I had packed the manual before launch.
This is a Mixed Conditional linking a past mistake (forgetting the manual) to a present, ongoing result (the alarm blaring / guessing buttons). It correctly uses the past perfect ("had packed") for the past condition and the present continuous conditional ("wouldn't be blaring" / "wouldn't be guessing") for the current result.
"If I packed" incorrectly treats the past event as a present hypothetical. "Wouldn't have been blaring right now" creates a tense clash; "wouldn't have been" refers to the past, but "right now" refers to the present.