1 present simple - to be
2 past simple - to replace
1. The advantages of the high-speed ground transport are ( Present Simple Active Voice; to be- инфинитив) obvious.
2. Steel replaced ( Past Simple Active Voice ; to replace - инфинитив ) iron everywhere in the rail construction
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1 present simple - to be
2 past simple - to replace
Verified answer
1. The advantages of the high-speed ground transport are ( Present Simple Active Voice; to be- инфинитив) obvious.
2. Steel replaced ( Past Simple Active Voice ; to replace - инфинитив ) iron everywhere in the rail construction