84. The mother didn’t know to blame for the broken glass as it happened while she was out.
A. who B. when C. how D. what
82. How beautifully she sings! I have never heard .
A. the better voice B. a good voice C. the best voice D. a better voice
81. All the leading newspapers the trade talks between china and the united states.
A. reported B. printed C. announced D. published
80. is known to everybody, the moon travels round the earth once every month.
A. it B. as C. that D. what
79. The warmth of sweater will of course be determined by the sort of wool used.
A. the; the B. the; / C./; the D./; /
78. It is generally believed that teaching is it is a science.
A. an art much as B. much an art as C. as an art much as D. as much an art an
77. We didn’t plan our art exhibition like that bat it very well.
A. worked B. tried out C. went on D. carried on
75. The WTO cannot live up to its name it does not include a country that is home to one fifth of mankind.
A. as long as B. while C. if D. even though