66. mrs. brown is supposed _a_ for italy last week.
a to have left b to be leaving c to leave d to have been left
be supposed to do sth. 应该（理应）做某事。
37. he's watching tv? he's _d_ to be cleaning his room.
a known b considered c regarded d supposed
regard as 把…认作
67. my camera can be _b_ to take pictures in cloudy or sunny conditions.
a treated b adjusted c adopted d remedied
treat 对待，处理; i'll treat you. 我请客，应用于真正请客之前。it's on me. 应用于结帐时。
adjust vt. 调整，调节; adopt vt. 收养，领养; remedy vt. 弥补，补救，修正;
68. a new technique _c_， the yields as a whole increased by 20 percent.
a working out b having worked out
c having been worked out d to have been worded out
yields 产量; work out 作出，推出
关于百分数之前介词的用法
increase to 80 percent 增加到80% （增加到用to）
increase by 60 percent增加了60% （表示增加的幅度用by）
55. between 1974 and 1997， the number of overseas visitors expanded _a_ 27%.
a by b for c to d in
69. children who are over-protected by their parents may become _c_.
a hurt b damaged c spoiled d harmed
spoil vt. 宠坏，溺爱
70. when mr. jones gets old， he will _b_ over his business to his son.
a take b hand c think d get
take over 接管接收; hand over 移交，交出; think over 仔细考虑; get over 克服，战胜。