问题

With so many forms ___, many students feel at a loss before the 2012 college entrance exam.[ ]
A: filling in
B: filled in
C: to fill in
D: to be filled in
B: filled in
C: to fill in
D: to be filled in
正确答案是:
同类题型
Shortly after the book Uncle Tom’s Cabin________, the Civil War of America________.
Tomorrow is Tom’s birthday Have yougot any idea_____the party is to be held
of children by 2060, when each group____ to account for about one fifth of the population
____ I can see, there is only one possible way to keep away from the danger[ ]