A.is
B.will be
C.is being
I'm not sure where our teacher is. She ______ to see Xiao Wang, who is ill at home.
A.can't have gone
B.shouldn't have gone
C.might have gone
D.must have gone
In this article, the writer mainly wants to tell the readers______.
A. that the universe is so large that we cannot imagine it
B. where the planets in the universe came from
C. how the high mountains were formed on the sun
D. why the tides over the surface of the sun were so powerful
Professor: What? An accident!______?
A.an,The
B.the,An
C.a,The
D.the,The
Professor Wang, ______ for his informative lectures, was warmly received by his students.
A.knowing
B.known
C.to be known
D.having known