Theengineer________myfatherworksisabout60yearsold.
A. towhom
B. onwhom
C. withwhich
D. withwhom幻灯片32
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Hehastwosons,________workaschemists.
A. twoofwhom
B. bothofwhom
C. bothofwhich
D. allofwhom
Heisamanofgreatexperience,________muchcanbelearned.
A. who
B. that
C. fromwhich
D. fromwhom
CarolsaidtheworkwouldbedonebyOctober,________personallyIdoubtverymuch.
A. it
B. that
C. when
D. which
Maythefourthistheday________weChinesepeoplewillneverforget.
A. which
B. when
C. onwhich
D. aboutwhich