V. Use the correct form of the word given in each sentence. 41 Severe damage to environment (cause) ................ by prolonged droughts in Central Viet Nam last July. 42 Tomorrow the dam (close) ................ to prevent salt water from entering the fields in TienGiang Province. 43 The hot weather (expect) ................ to continue while there were longer hours of sunshine. 44 Two naval ships(send) ................ to the island to rescue fishermen. 45 Oil rigs throughout the Gulf of Mexico (hit) ................ during Hurricane Katrina. VI. Read the passage and choose the letter A, B, C or D to answer these following questions Two of the most dangerous storms which affect America are hurricanes and tornadoes. They are very much feared by anyone who may live in the path of their destruction.\n Every year homes are destroyed by their fury and often lives are lost. Most people who live near the coast are forced to evacuate their homes and to move to safer areas until the storm passes. Floods are caused along the coasts by both the heavy rain and a storm tide that is considerably above normal water level. The high winds, coastal flooding and heavy rains associated with a hurricane cause enormous damage.\n Hurricanes usually develop between July and October. Once they hit land they carry tremendous power with driving rain and wind.\n Tornadoes are violent low - pressured storms. These storms occur most often during the summer months and are noticeable by their strong wind and lack of rain. The sky turns black as dust is sucked up into the air. Tornadoes are capable of lifting quite heavy objects from the ground. They can pick up trees and cars right into the air and even uplift heavier objects such as homes and railway cars.\n Both hurricanes and tornadoes cause millions of dollars worth of damage to life and property every year. Today they can be predicted more easily than in the past, but they cannot be stopped or ignored.\n 46 What are two of the most dangerous storms which affect America? a. Hurricanes and tornadoes. b. Typhoons and thunderstorms. c. Thunderstorms and hurricanes. d. Hurricanes and typhoons. 47 At which part of the year do hurricanes usually develop? a. July and August only. b. All the year round. c. From the seventh to the ninth month. d. Between July and October. 48 What is the major similarity of both a hurricane and a tornado? a. They cover only a small area. b. They can cause great damage. c. They are not accompanied by rain. d. They have either wind or speed. 49 Which of the following is true of tornadoes and hurricanes? a. They cannot be predicted with accuracy. b. They are easier to control today than in the part. c. They can be predicted today with greater accuracy. d. They cannot be predicted today with greater accuracy. 50 Which of the following was not mentioned in the article? a. The number of people killed each year by these storms. b. The tremendous power killed each year by these storms. c. The damage caused by hurricanes and tornadoes. d. The time of year when they are most likely to strike