Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of stress in each of the following questions.

A. which

B. who

C. why

D. where

A. did

B. gave

C. made

D. took

A. Problems faced by science teachers

B. Learning English through reading books

C. Teaching science and math in English

D. Why English is difficult for students

A. If the restaurant weren't very crowded, I can't find a seat there.

B. If the restaurant isn't very crowded, I can find a seat there.

C. If the restaurant were very crowded, I could find a seat there.

D. If the restaurant weren't very crowded, I could find a seat there.

A. You should turn off your phone before the exam starts.

B. You are required to use your phone for the exam.

C.You must not use your phone while taking the exam.

D. You can use your phone after the exam ends.

A. are encouraged

B. encourage

C. have encouraged

D. encouraged