Would you please ____ _____ to the little boy?

73.They left school when the rain stopped yesterday afternoon.

They _____leave school ______ the rain stopped yesterday afternoon.

74.Mr Wu often helps me to study English.

Mr Wu often ____ me _____ my English.

75.Is Mr Black in?

Is Mr Black _____ _____?

76.Meimei studies math very well..

Meimei is _____ ______ math.

Meimei ______ _____ in math.

77.When they saw the teacher,they didn’t talk anymore.

When they saw the teacher,they ______ ______.

78. I’ll go to help you in a minute

I’ll go to help you ____ ____.

79. Work hard,and you can pass the exam.

____ you don’t study hard,you’ll_____in the exam.

80.Could you please clean your desk?

Would you _____ _____ your desk?

81.I bought the computer six months ago.