That there is no sharp dividing line between insulators and conductors is ______ we have learned in this lesson.
A. that
B. which
C. what
D. it
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The book, ______was recently published, was translated by my husband.
A. that
B. such
C. which
D. when
Speaker A: Would you care for another helping(还要再吃点东西吗) Speaker B:______
A. I have helped enough.
B. No more help is needed.
C. No, thanks, I' m quite full.
D. Please pass me the helpin
She ______ the temptation to buy a coat she could not afford.
A. challenged
B. obstructed
C. contradicted
D. resisted
Never in my life______such a strange thing.
A. do I have heard
B. have I heard
C. I heard
D. I have heard
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