87. Can I borrow one of your pencils?

one of + tính từ sở hữu + N số nhiều 

= a/an + N số ít, đếm được + of + đại từ sở hữu

88. You look like Nick and Peter. Are you a relative of theirs?

89. Miss Tram is an aunt of mine.

90. I went on holiday with two friends of theirs.

91. The woman asked John if she might ask him a few questions.

S + asked + O + if/whether + S + V (lùi thì)

may → might 

92. Lan asked her father if they would be able to live on Mars in 2050.

S + asked + O + if/whether + S + V (lùi thì)

will → would 

93. My father said that there had been no cell phones a long time before.

S + said (that) + S + V (lùi thì)

QKĐ → QKHT

ago → before 

94. Two days ago, Tom phoned me and said that he couldn't come in that day because he was sick. 

S + said (that) + S + V (lùi thì)

can → could 

HTĐ → QKĐ

today → that day 

95. Even though the weather was freezing, we had a great holiday in Canada.

Although / Though / Even though + clause, clause: mặc dù