填空题 Directions: Using the information in the text, complete each sentence 6-10, with a word or phrase from the list below. For each sentence(6-10), mark one letter(A-G)on your Answer Sheet. Do not mark any letter twice. A. snowflakes B. underwater pressure C. they can turn over suddenly D. the nature and origin of iceberg E. the size and shape of iceberg F. they are located in remote regions of the world G. snowflakes lost feathery points after evaporation and melting

填空题 According to the passage, the icebergs are rarely seen because 1.

填空题 The author states that icebergs are dangerous because 1.

填空题 Icebergs afloat today originate from 1.

填空题 Tiny grains of ice are formed when 1.

填空题 This passage is mainly about 1.