It is on this ( ) that say that human civilization may have come from some planet in the universe.

(单选题)He who loves practice without theory is ( ) the sailor wh (单选题)Within months, new structures ( ), bridges are constructe (单选题)Many students complain of the ( ) college entrance exam f (单选题)These sections may be broken down into a variety of subsecti (单选题)Which deduction may NOT be true ( ). (单选题)What is the author implying by last sentence? ( ). (单选题)What can be inferred from the context? ( ). (单选题)Which of the following choice all contains GCC states? ( (单选题)Which of the following statement is true according to the pa (单选题)The main purpose of the passage is ( ).