Ở một loài thực vật, người ta tiến hành các phép lai sau:

(1) AaBbDd x AaBbDd                    (2) AaBBDd x AaBBDd

(3) AABBDd x AAbbDd                   (4) AaBBDd x AaBbDD

Các phép lai có thể tạo ra cây lai có kiểu gen dị hợp về cả ba cặp gen là:

A. (2) và (4)

B. (2) và (3)

C. (1) và (3)

D. (1) và (4)

Ở nhiệt độ cao, khí H₂ khử được oxit nào sau đây?

A. Al₂O₃.    

B. MgO.      

C. CuO.      

D. CaO.

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

A scientist said robots will be more intelligent than humans by 2029. The scientist's name is Ray Kurzweil. He works for Google as Director of Engineering. He is one of the world‘s leading experts on (25)______  intelligence (A.l). Mr Kurzweil believes computers will be able to learn from experiences, just like humans. He also thinks they will be able to tell jokes and stories, and even flirt. Kurzweil‘s 2029 prediction is a lot sooner than many people thought. The scientist said that in 1999, many A.I. experts said it would be hundreds of years (26)____ a computer was more intelligent than a human. He said that it would not be long before computer (27)______ is one billion times more powerful than the human brain.

 Mr Kurzweil joked that many years ago, people thought he was a little crazy for predicting computers would be as intelligent as humans. His thinking has stayed the same but everyone else has changed the way they think. He said: “My views are not radical any more. I've actually stayed (28)______. It's the rest of the world that's changing its View.” He highlighted examples of high-tech things we use, see or read about every day. These things make us believe that computers have intelligence. He said people think differently now: "Because the public has seen things like Siri (the iPhone’s voice-recognition technology) (29)______ you talk to a computer, they've seen the Google self-driving cars."

(Source: https://breakingnewsenglish.com)

Điền vào số 28

A. which

B. where 

C. whom 

D. what

Trong quá trình nhân đôi ADN, mạch đơn mới được tổng hợp liên tục trên mạch khuôn có chiều

A. không có chiều nhất định 

B. 5’ → 3’ 

C. cả 2 mạch của ADN 

D. 3’ → 5’ 

Mark the letter A, By Cy or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

We spend about one-third of our lives sleeping. We know relatively little about our sleep

A. We shall know more about our sleep if we spend more than one-third of our lives sleeping

B. We know relatively little about our sleep; as a result, we spend about one-third of our lives sleeping

C. Despite spending about one-third of our lives sleeping, we know relatively little about our sleep

D. We spend about one-third of our lives sleeping so that we know relatively little about our sleep