Question

Answer 1

giúp mình với ạ mình cảm ơn.

Answer 2

87. One thing that he needs to improve is pronunciation.

88. There are also different ways of learning the same number of words.

89. You must put all chemicals and drugs in locked cupboard.

90. He isn't old enough to be in my class.

91. He worked with deaf-mutes at Boston University.

92. He demonstrated his invention at a lot of exhibitions.

93. Travelling all over America, Bell demonstrated his invention to the public at countless exhibitions.

94. Mon had to do everything without the help of modern equipment.

95. As Little Pea ran to the festivals, she dropped one of her shoes and lost it.