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单选题

Edison tested more than one thousand materials to see if they could _____ electric ; current and glow.

A
bring
B
make
C
carry
D
produce

题目答案

C

答案解析

暂无解析
举一反三
单选题

He has made another wonderful discovery, _____ of great importance to science.

A
whichIthinkis
B
inwhichIthinkitis
C
whichIthinkitis
D
ofwhichIthinkitis

题目答案

A

答案解析

暂无解析
单选题

You should not have driven that car with its brakes out of order. You _____ a serious

A
mighthave
B
mighthavehad
C
shouldhave
D
shouldhavehad

题目答案

B

答案解析

暂无解析