56. You cannot __________ the trains; they are always late.

57. The disease spread everywhere, into villages, _________ into the cities.

58. Scientists have found that acid rain __________ the lakes and forests.

59. Students should be taught how to _________ their dictionaries while reading.

60. In summer people love to wear dark glasses to _______ their eyes _____ the sun.

根据所给短文的意思，用下面文本框中所给单词或短语的正确形式填空。（文本框中所给单词或短语有多余）

56. You cannot __________ the trains; they are always late.

57. The disease spread everywhere, into villages, _________ into the cities.

58. Scientists have found that acid rain __________ the lakes and forests.

59. Students should be taught how to _________ their dictionaries while reading.

60. In summer people love to wear dark glasses to _______ their eyes _____ the sun.