Part III Vocabulary (20 minutes)(共30小题；每小题0.5分，满分15分)Directions: There are 30 incomplete sentences in this part. For each sentence there are four choices marked A), B), C) and D). Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
51、The ball ________two or three times before rolling down the slope.
（本题分值：0.5分）
【正确答案】
B
A). swayed
B). bounced
C). hopped
D). darted
52、He raised his eyebrows and stuck his head forward and ________it in a single nod, a gesture boys used then for O.K. when they were pleased.
（本题分值：0.5分）
【正确答案】
C
A). shrugged
B). tugged
C). jerked
D). twisted
53、Many types of rock are________from volcanoes as solid, fragmentary material.
（本题分值：0.5分）
【正确答案】
C
A). flung
B). propelled
C). ejected
D). injected
54、With prices ________ so much, it is difficult for the school to plan a budget.
（本题分值：0.5分）
【正确答案】
B
A). vibrating
B). fluctuating
C). fluttering
D). swinging
55、The person who ________this type of approach for doing research deserves our praise.
（本题分值：0.5分）
【正确答案】
A
A). originated
B). speculated
C). generated
D). manufactured
56、________ that the demand for power continues to rise at the current rate, it will not be long before traditional sources become inadequate.
（本题分值：0.5分）
【正确答案】
C
A). Concerning
B). Ascertaining
C). Assuming
D). Regarding
57、Her jewelry ________under the spotlights and she became the dominant figure at the ball.
（本题分值：0.5分）
【正确答案】
B
A). glared
B). glittered
C). blazed
D). dazzled
58、Connie was told that if she worked too hard, her health would ________.
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【正确答案】
A
A). deteriorate
B). descend
C). degrade
D). decay
59、We find that some birds ________twice a year between hot and cold countries.
（本题分值：0.5分）
【正确答案】
C
A). transfer
B). commute
C). migrate
D). emigrate
60、As visiting scholars, they willingly________to the customs of the country they live in.
（本题分值：0.5分）
【正确答案】
B
A). submit
B). conform
C). subject
D). commit