100. by chance(=accidentally, by accident)偶然

99. for certain of (=for sure )肯定地,有把握地

98. be certain of (=be sure of) 有把握, 一定.

97. center one’s attention on(=focus one’s attention on) 把某人的注意力集中在…上

96. be cautious of 谨防

95. in no case在任何情况下都不(放句首倒装句)

94. in case of (=in the event of)如果发生…万一

in the case of 至于…, 就…而言

93. in case (=for fear that) 万一;

92. in any case(=for love or money, at any rate, at any price, at any cost, whatever happens; anyhow)无论如何

91. be capable of 能够, 有能力

be capable of being +过去分词:是能够被…的