1, Sửa lỗi sai               (GIẢI THÍCH TẠI SAO GIÚP MÌNH LUÔN NHÉ)

81. Before I came (A) to England, I hadn't had (B) the opportunity to speak to (C) people their (D) native tongue is English.

82. No one has (A) said anything (B) would (C) persuade me to change (D) my mind.

83. The woman sitting (A) on the red chair is (B) the person to who (C) you must (D) give this envelope.

84. There are (A) some teachers in our school try (B) to improve (C) the quality of teaching by making (D) use of hi-tech devices.

85. Modern children, who (A) lives have become more and more (B) dependent on (C) electronic devices, find the traditional way of teaching very dull and boring (D).

86. Smartphones and tablets (A) which (B) can be used as (C) effective learning tools (D) for children.

87. What is (A) the name of the girl (B) that her (C) mobile phone was stolen (D)?

88. A tablet (A) is a mobile (B) computer is (C) also useful for (D) language learning.

89. Those (A) want to improve (B) their English can download free digital (C) lessons from the Internet to study (D).

90. Mr Peterson who (A) has worked (B) for the same school all his life (C), is retiring (D) next month.