71.
If you call to him and explain your problem he will help you.

72.
She would not go to his house unless I go with her.

73.
Don't forget to telephone me after you reach Delhi.

74.
With a thundering roar the huge rocket soared up from the launching pad.

75.
Not till he got home he did realise that he had lost his keys in the theatre.

76.
He enjoys nothing more than drawing swords with others.

77.
Anybody would like assist you for improvement in the work.

78.
His colleagues could not tell me why did he not come to office yesterday.

79.
He should not had done it.

80.
My elder sister and her daughter helps me in my domestic work.