—I wonder ________ Mary has made rapid progress in such a short time.
—By working extremely hard every day.
A. where B. how
C. why D. if
Earning money by collecting rent from tenants (房客) is easy and happy, but that’s not ________ we study for.
A. what B. whom
C. why D. when
________ to speak when the audience interrupted him.
A. Hardly had he begun B. No sooner had he begun
C. Not until he began D. Scarcely did he begun
At no time ________ in the exam. It was unfair to punish them.
A. they actually cheated B. do they actually cheat
C. did they actually cheat D. they had actually cheated
Only when the teacher walked into the classroom ________ that she had left the speech note at home.
A. she realized B. has she realized
C. she has realized D. did she realize
________ from the north side, the beautiful water fall just looks like three fairies with long hair.
A. Viewed B. Viewing
C. Having viewed D. To view
