Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges.

- David: “ _____________ ” - Mike: “I won’t say no!”

A. How are things with you, Mike? 

B. What about playing badminton this afternoon? 

C. Mike, do you know where the scissors are? 

D. What’s your favourite drink, tea or coffee?

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.

Question 26: The last time when I saw her was three years ago.

A. I have often seen her for the last three years.

B. About three years ago, I used to meet her.

C. I have not seen her for three years.

D. I saw her three years ago and will never meet her again.

Cho cặp P thuần chủng về các gen tương phản giao phấn với nhau. Tiếp tục tự thụ phấn các cây F₁ với nhau, thu được F₂ có 75 cây mang kiểu gen aabbdd. Về lí thuyết, hãy cho biết số cây mang kiểu gen AaBbDd ở F₂ là bao nhiêu?

A. 300 cây. 

B. 150 cây. 

C. 450 cây. 

D. 600 cây