This is the biggest lab__________we have ever built in our university.
A.which B.what C.that D.Where
Please pass me the dictionary _______cover is black.
A. which B. its C. whose D. which of
Can you solve such problems___raised by the audience?
A.what were B.as were C.that were D.which were
He has left Beijing,___a meeting is to be held.
A.when B.where C.as D.which
We often think of the days___we spent together on the island.
A.when B.which C.in which D.during which
All the apples___fell down from the tree were eaten up by the pigs.
A.they B./ C.that D.which
