According to the passage, why are researchers developing GM trees?
A.To improve or make paper less expensive.
B.To produce more fruit.
C.To find a way to make paper without pulp.
D.To replace trees cut down for paper.

What is the topic of the paragraph?
A.Controversial GM products.
B.The hazards of GM products.
C.Non-food GM products.
D.GM cotton and tobacco.

The word ”switch” in the last paragraph can best be replaced by ___________ .
A.select
B.plant
C.change
D.replace

What is the main idea of the passage?
A.The importance of sharing housework in a family.
B.The importance of having children in a family.
C.The role of members in family.
D.The healthy relationships among members in family.

Ideally, each child is nurtured, respected, and grows up________?
A.to keep in touch with the people around them.
B.to keep a track of the people around them.
C.to be familiar with the people around them.
D.to be concerned about the people around them.

Her style of dress was conservative. She never wears items that are too tight, short or low-cut.
A.high-fashion
B.up to date
C.traditional
D.trendy

Hoa and Laura are talking about their volunteer work.

Hoa: "Thank you very much for helping the disadvantaged children here."

Laura: "________."
A.What a pity!
B.It's our pleasure.
C.That's nice of you!
D.Sorry, we don't know.

Marry and Janet are at the dancing club.

Marry: "You are a great dancer. I wish I could do half as well as you."

Janet: "_______. I'm an awful dancer."
A.You've got to be kidding!
B.You're too kind
C.Oh, thank you very much
D.That's a nice compliment!

A.final
B.identity
C.applicant
D.decide

What does the word "These" in paragraph 2 refer to?
A.good and bad times
B.feelings
C.relationships
D.high sand lows