220.Students should _____ skip school to study for tests _____ cheat on the exam to get better grades. (A) both； and (B) neither； nor (C) either； or (D) not only； but also

222.To understand bees better and to help them survive even in urban environment, a group of biologists at Queen Mary University of London _____ currently _____ the London Pollinator Project. (A) are； sponsoring (B) have； sponsored (C) will； sponsor (D) were； going to sponsor