Fill in the blanks with the appropriate forms of verbs given in the brackets and complete the texts:
The blackest cloud I …………1…………. ever …………….1……….. (see) squatted over Mussoorie, and then it …………2………… (hall) marbles for half an horn. Nothing like a hailstorm …………3……….. (clear) the sky. Even as I write, I see a rainbow ………..4…………… (form).