Gilbert Newton Lewis, a chemist, helped to develop the modern electron theory

of valence, a theory what explains the forces holding atoms together in molecules.

The sentence 1, 2, 3, 4 in the following paragraph are in the wrong order. Choose the correct order to make a good paragraph.

(1) Therefore, anyone who wants to drive must carry a driver’s license. (2) It’s divided into four steps: studying the traffic laws, taking the written test, learning to drive and taking the driving test. (3) Getting a driver’s license is a complicated process. (4) Driving a car is a necessity in today’s busy society, and it is also a special privilege.

It rained heavily, so the football match was cancelled

I don't find it difficult to get up early in the morning.

Mark the letter A, B, C, D on your answer sheet to indicate the word that differs from the rest in the position of the main stress.

Mark the letter A, B, C or D on your answer sheets to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Mr. Gerstein was particularly taken aback to hear that sleeping problems are often linked to physical problems.