The police could not find a motive for the murder.
A. target
B. reason
C. discussion
D. remark
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Relief workers were astonished by what they saw and heard.
A. moved
B. touched
C. surprised
D. worried
He has found a lot of reasons to explain his failure.
A. effects
B. results
C. causes
D. bases
一个16K×32位的存储器，其地址线和数据线的总和是___。
A. 48；
B. 46；
C. 36；
D. 38。
She was cheerful to hear that his son has got the gold medal.
A. excited
B. hateful
C. horrible
D. thankful
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