56. _d_， a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.
a other things to be equal b were other things equal
c to be equal to other things d other things being equal
b项如果不省略if应为：if other things were equal
如果从句用虚拟语气，主句也必须用虚拟语气形式。
other things being equal 在这里是独立主格做条件状语。
57. _c_ that my head had cleared， my brain was also beginning to work much better.
a for b since c now d despite
注意以下三个后面加句子的表达形式：
1 in that 由于，因为; 2 now that 既然，由于; 3 except that 除了…之外。
59. by 1929， mickey mouse was as popular _b_ children as coca-cola.
a for b with c to d in
be popular with + 人的群体 受…欢迎。
60. because edgar was convinced of the accuracy of this fact， he _a_ his opinion.
a stuck to b strove for c stuck at d stood for
be convinced of 深信，确信; stick to 坚持; strive for 力求，拼命争取。
don’t strive for perfection. 不要凡是都力求达到完美状态。
60. we object _c_ punishing a whole group for one person’s fault.
a against b about c to d for
68. the newest satellite can _a_ a thousand telephone conversations and a color tv program at the same time.
a carry b extend c bring d take
carry vt. 传送，传输; extend vt. 延伸，延续(extend to 延伸到，延续到)。
fetch vt. 去拿来，去请来，去叫来; fetch water 打水。