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
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
Mr. Wang and his son, both looking very happy, ______ taking a walk in the park.
A. are
B. is
C. has
D. have