一、单项选择 1.May 10,2017 was marked as ________ first Chinese Brands Day(中国品牌日). “Made in China” has come of age. A. a B. an C. the D.不填 2. The young mother won't leave her baby _______ she is sure that he has already been asleep. A. unless B. because C. if D. since 3. — Do you enjoy the songs sung by Jay Chou? — Of course. Not only I but also my parents ________ his fans. A. am B. are C. was D. were 4. Which of the following words is pronounced /raiz/ ? A. race B. ride C. rose D. rise 5.China's first home-built aircraft carrier(航空母舰) hit the water in Dalian _______ the morning of April 26, 2017. A. in B. on C. at D. to