Exercise 3: Choose the best answer of each question below. 1. The application form______to the university before May 31st. A. must send B. sent C. must be sended D. must be sent 2. The acupuncturist decides which and how many needles we can______. A. be use B. be used C. use D. used 3. Acupuncture may not______if you have low white blood cell counts or low platelet counts. A. recommend B. be recommended C. is recommended D. recommended 4. In recent years, the government has imposed pollution controls on automobile manufacturers. Both domestic and imported automobiles must ______ anti-pollution devices. A. equip with B. be equipped with C. equip by D. be equipped by 5. Do you believe that such a problem can______? A. be solved B. be solving C. is solved D. solve 6. A lot of pesticide residue can______unwashed produce. A. find B. found C. be founded D. be found help me !!