To complete the sentences with suitable phrases or words from the given options, let's examine each sentence carefully and select the most appropriate phrase:
(a) The baby was crying. It stopped crying as soon as it saw its mother.
Here, 'as soon as' indicates that the action of stopping crying happened immediately after the baby saw its mother.
(b) Rana, don't miss the programme. It will start at 10. If there is any change, I will inform you.
'There' is used here to talk about the existence of any change in the program's timing.
(c) It is a good idea to walk in the morning. It refreshes both the body and mind.
'It' is referring to the act of walking in the morning, suggesting it is beneficial.
(d) I had an appointment at 4pm. I had better start now.
'Had better' is used to indicate that it is advisable to start moving towards the appointment.
(e) She wanted to celebrate her birthday. She would rather decorate her room.
'Would rather' is used to express a preference, in this case, decorating the room for her birthday.
(f) I have not yet seen the body, let alone the newborn baby was born ?
'Let alone' is used to emphasize that something is even less likely or possible. Here, it indicates that the speaker hasn't seen the newborn baby at all.
(g) What is it like swimming in the river? It seems to be very heroic to me.
'What is it like' is a way to ask for a description or an opinion about the experience of swimming in the river.
(h) He is very rude. He does not behave well with his parents, let alone others.
'Let alone' is used here to indicate that his treatment of others is worse or equal to the treatment of his parents.
Each phrase or word choice serves a specific function in the sentence, making it cohesive and meaningful.