曲轴位置传感器主要可分为磁脉冲式、光电式和霍尔式三大类。()
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They soon______ serious trouble()
A. ran after
B. followed
C. had
D. ran
Mr. Ian Thompson ______a public house a short time ago()
A. has bought
B. bought
C. was bought
D. is bought
It occurred to him to open it. He thought ______it()
A. of opening
B. to open
C. to have opened
D. opening
Meanwhile my tongue was busy⋯.______ my tongue was busy⋯()
A. However
B. In the mean time
C. Nevertheless
D. Although