21道题
| A.a; an | B.the; an | C.a; the | D.the; the |
| A.wrong something | B.nothing wrong |
| C.something wrong | D.wrong nothing |
| A.carry | B.leave | C.save | D.treat |
| A.What | B.What an | C.What a | D.What the |
| A.None | B.Something | C.Nothing | D.Anything |
| A.Two-fifths, are | B.Two-fifth, are | C.Two-fifths, is | D.Two-fifth, is |