... strengthen48. a. was become b. has become c. is become d. is becoming49. a. competition b. examination c. test d. round50. a. work b. history c. period d. race 10 http://thuyquynh.violet.vn/ d. ... d. whom49. a. ask b. say c. tell d. demand50. a. cultures b. habits c. traditions d. customs TEST 2Choose the word which has the underlined part pronounced differently from the rest.1. a. ... which a variety of safety issues make it unsafe to dive using recreation diving equipment and practices, and specialized training and equipment for technical diving are needed.36. Recreational...