Your English 50 Inventing a Solar Pump 2

Your English

English - November 28, 2012 18:00 - 14 minutes - 12.9 MB - ★★★★ - 32 ratings
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Engineering vocabulary with action words in the past Cont. (regular/irregular verbs ending with a voiceless consonant (simple past pronounced [t] as opposed to [d] or [id])