Câu 1: Tourists today flock to see the two falls that actually constitute Niagara falls.
A. come without knowing what they will see
B. come in large numbers
C. come out of boredom
D. come by plane
Câu 2: Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
A. record B. shine C. categorize D. diversify
Câu 3: She is always diplomatic when she deals with angry students.
A. strict B. outspoken C. firm D. tactful