61.
It is essential to thoroughly clean the machine after each use.

62.
I have got some tea, but I do not have a sugar.

63.
I was delighted to see him fully recover.

64.
By definition, make a map is to select certain features as relevant and ignore others.

65.
Each of our students pay their tuition fee at the beginning of the month.

66.
Do not take another step, else your life will face great peril.

67.
Mary met with an accident. She didn't just twist her leg, she has broken it.

68.
If I was you, I would not have joined the party.

69.
If you are absent for a week, you have to catch with the work when you return.

70.
He was urgently in need to get his eye operation.