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.

Speech is one of the most important (13) ______ of communicating. It consists of far more than just making noises. To talk and also to (14) ______ by other people, we have to speak a language, that is, we have to use combinations of (15) ______ that everyone agrees to stand for a particular object or idea. Communication would be impossible if everyone made up their own language.

Learning a language properly is very (16)______ . The basic (17) ______ of English is not very large, and not only about 2,000 words are needed to speak it quite (18)______. But the more idea you can (19) ______ the more precise you can be about their exact meaning.

Words are the (20) ______ thing we use in communicating what we want to say. The way we (21)______ the words is also very important. Our tone of voice can express many emotions and (22) ______ whether we are pleased or angry, for instance.

Điền vào ô 17

A. grammar 

B. structure 

C. vocabulary

D. word

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions
The police have concluded tentatively that the explosion was caused by a bom

A. differently

B. hesitantly

C. certainly

D. temporarily