Science is still ______ of the causes of many kinds of cance

【名词&注释】

混合物(mixture)、无意识(unconsciousness)、错误信息(wrong information)、胜利者(victor)

[单选题]Science is still ______ of the causes of many kinds of cancer.

A. ignorant
B. unconscious
C. conscious
D. informed

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[单选题]Tom: You are playing guitar well. Can you read music? Charles: No, I don't. I just listen to songs on the radio and then play them until they sound right. Tom: ______ Charles: No, really.

A. You're lying
B. You're cheating
C. You are boasting
D. You're kidding

[单选题]He was in a hurry and left things in a real ______.

A. mixture
B. confusion
C. mess
D. mass

[单选题]

B． as C． and D． but 正确答案：D解析：本句话是一个转折关系，应该由but一词体现前后的对比关系。全句意思为：也许他们是胜利者^(victor)，但他们肯定不是最文明的。

A. sinceB． as
B. and
C. but

[单选题]What should you do ff your child is under six years old?

A. You should let him take two tablets a day.
B. You should reduce the dosage anyway.
C. You should find the directions on the bottle.
D. You should ask the doctor for advice.

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