II. Lựa chọn từ hoặc cụm từ phù hợp nhất để hoàn thành các câu dưới đây bằng cách khoanh tròn A, B, C hoặc D

Question 11: The meat has to _________ when taking out of the fridge.

• A. frost
• B. defrost
• C. be defrosted
• D. be defrosting

Question 12: The US first __________ of the Moon began with the Ranger 4 impactor in 1962.

• A. exploration
• B. explosion
• C. experiment
• D. excitement

Question 13: Don’t you think my jeans need _______?

• A. clean
• B. to clean
• C. cleaning
• D. cleans

Question 14: Artificial intelligence (AI) is an area of __________ concerned with making computers copy intelligent human behaviour.

• A. field
• B. study
• C. reality
• D. technique

Question 15: Do you know who _________ the ball point pen?

• A. invent
• B. invented
• C. inventing
• D. invents