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58. 瞬間，他消失在人群中。

He disappeared in the crowd    .

57. 當時，學生們正在為第二天的考試做準備。

The students    the next day’s test at that time.

56. 在教室的前面有一塊黑板。

There is a blackboard    the classroom.

55. We will remember the heroes (永遠) .

54. He has read five novels (最近) .

53. It seems that nothing (使?jié)M意) him.

52. The boy is standing on the (寬) table.

51. Don’t say that. It isn’t your (借口).

50. Look!The clock is in the s of a heart.