As a defense against air pollution damage, many plants and animals ______ a substance to absorb harmful chemical.

(单选题)On 25th September, We Chat removed ______ could be considere (单选题)The goal which they are unlikely to live to see ______ is to (单选题)______ the number of people queening up outside, Apple Store (单选题)Look forward! Not until you let go of your past failures and (单选题)The main purpose of the passage is to ______. (单选题)The last two paragraphs tell us that ______. (单选题)We can learn from the passage that the blindfolded group ___ (单选题)With the lights out, diners eat less partly because ______. (单选题)What is the best title for the passage? (单选题)Which of the following words can best describe Alexis?