Question 16. I use social media mainly to __ my pictures with my friends A. take B. have C. share D. make Question 17. The biofuel industry __ on developing in recent years because natural fuel sources are running out. A. focuses B. has focused C. has been focusing D. has been focused Question 18. Their products __ on many social media platforms. A. are advertising B. are advertised C. advertise D. have been advertising Mark the letter A,B, C, or D to indicate the word(s)OPPOSITE in meaning to the underlined bold word(s) in each of the following questions. Question 19. A triangle is defined as a plane figure with three straight sides and three angles. A. loud B. unique C. curved D. spherical Mark the letter A B, C, or D to indicate the word(s)CLOSEST in meaning to the underlined bold word(s) in each of the following questions. Question 20. Do you think that traditional festivals are losing their meaning in modern life? A. conventional B. individual C. digital D. commercial

Here are the answers and explanations for the questions:<br /><br />**Question 16:**<br /><br />* **Correct Answer:** C. share<br />* **Explanation:** The sentence talks about using social media to interact with friends. Sharing pictures is a common way to do this. The other options don't fit the context.<br /><br />**Question 17:**<br /><br />* **Correct Answer:** C. has been focusing<br />* **Explanation:** The sentence describes a continuous action that started in the past and continues to the present. The present perfect continuous tense (has been focusing) is the appropriate tense to use.<br /><br />**Question 18:**<br /><br />* **Correct Answer:** B. are advertised<br />* **Explanation:** The sentence is in the passive voice, meaning the products are the ones being acted upon. The correct passive form is "are advertised."<br /><br />**Question 19:**<br /><br />* **Correct Answer:** C. curved<br />* **Explanation:** The opposite of straight sides is curved sides. The other options are not relevant to the definition of a triangle.<br /><br />**Question 20:**<br /><br />* **Correct Answer:** A. conventional<br />* **Explanation:** Traditional festivals are by definition conventional, meaning they follow established customs and practices. The other options are not synonymous with traditional. <br />