LiPingisnolonger_____hewastenyearsago.
A. that
B. if
C. whom
D. what
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Informationhasbeenputforward______moremiddleschoolgraduateswillbeadmittedintouniversities.
A. while
B. that
C. when
D. which
Itissaidthatmoremiddleschoolgraduateswillbeadmittedintouniversities。Thisistheinformation_______hasbeenputforward.
A. while
B. that
C. when
D. what
Mr.Smithlookedverydepressed.Doyouknow______histroublewas?
A. that
B. why
C. how
D. what
电火花加工的基本要求是被加工材料具有足够的。
A. 强度
B. 韧性
C. 硬度
D. 导电性