Choose the correct option a, b, c or d to complete this passage. Dolphins are known as marine (1) ______they breathe air, they are warm-blood, and they bear live young ones called (2) ______ The size of dolphin is very greatly. (3)______ smallest dolphins are just about 50 kg in weight and 1.2 meters in length (4) ______the largest one can weigh up to 8.200 kg and is 10 meters long. Dolphins are sociable creatures. They swim together in group known as (5) ______They show great ability in the water. Dolphins are interested (6) ______humans and often rescue people in the sea (7) ______are in danger. They are intelligent creatures and make sounds to (8)_____ with each other. Scientists have studied dolphins (9) _____many years and are now looking into the possibility of dolphins that are able to carry (10) _____ tasks under the sea.
Choose the one word or phrase - A,B, C or D - that best completes the sentence: Example: After it __________ dry for two months, it rained heavily last night. A. was B. would be C. had been D. has been
Choose the one word or phrase - A, B, C or D - that best completes the sentence. Example: About 120 people _________ with the virus of bird flu since it _________ in Asia in 2003. A. have infected/ spread B. were infected/ has spread C. have been infected/ spread D. have been infected/ was spread .