Put in the missing prepositions: 1) He was beeing laughed ... when l came 2) The doctor has already been sent ... 3) The child will be looked ... by my sister 4) They were waited ... very long yesterday 5) This book is offten referred ...

1) He was being laughed at when l came.

2) The doctor has already been sent for.

3) The child will be looked after by my sister.

4) They were waited for very long yesterday.

5) This book is often referred to.

6) The newspapers were looked through by my father yesterday.