Question

fill in the blanks with the correct form of verbs given in the brackets
1) I_ (practice) piano when she_ (come) in.
2) burning of coal and oil_ (release) nitrogen oxide which (cause) breathing problems
3) He_ (return) the book I _ (lend) him.
4) we _ (go) out only when the rain_ (stop)​

Answer 1

Answer:

was practising,came

releases, causes

returned, lend

Explanation:

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Answer 2

Answer:

1.practice, comes

2releases, causes

3returned, lended

4 go, stops