Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 18 to 22.

We all want to live in a clean and green world and breathe pollution free air. For this kind of environment we desperately need a fossil fuel free world. Scientists are toiling hard to come up (18)______ alternative fuels which can replace conventional fuels. One such study was presented at the 237th National Meeting of the American Chemical Society. This study throws interesting light on the first economical, eco-friendly process to (19)______ algae oil into biodiesel fuel. The scientists are quite hopeful that one day America will become independent (20)______ fossil fuels. Ben Wen is the (21)______ researcher and vice president of United Environment and Energy LLC, Horseheads, N.Y. According to him, “This is the first economical way to produce biodiesel from algae oil. It costs much less than conventional processes because you would need a much smaller factory, there (22)______ no water disposal costs, and the process is considerably faster.”
Question 21:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
There has been little rain in this area for too long, ______?

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
We were all in a good mood because the weather was good and we were going on holiday the next day.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
My neighbors are really tight with money. They hate throwing away food, don’t eat at restaurant, and always try to find the best price.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
“How long have you been in this job?” She asked him.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Historically, it was the 3^rd Asian Games in Japan that tennis, volleyball, table tennis and hockey were added.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
She really treasures the ______ car that she inherits from her grandfather.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The villagers are not sure how they are going to get ______ another hard and cold winter.