Directions: Complete the sentences on Answer Sheet 2 by translating into English the Chinese given in brackets.

　　87. ________________________ (幸亏遇到一位好心的出租车司机), Amy arrived at the test room in time.

　　88. ________________________ (这是一个生死攸关的问题) and therefore we must pay more attention to it.

　　89. The problem of internet crime ________________________ (近些年来引起了广泛关注).

　　90. The computer isn't working properly; ________________________ (肯定有什么地方出了毛病).

　　91. ________________________ (应当注意的是) that pollution has become one of the thorniest problems in many big cities.