_______ is known to all, grammar is not a set of dead rules.
A.That B.Which C.As D.It
The exhibition tells us _____we should do something to stop air pollution.
A.where B.why
C.what D.which
What surprised me was not what he said but the way _______ he said it.
A.that B.in that
C.what D.where
— It was careless of you to have left the house without turning off the gas.
— My god! _______.
A.So were you B.So was I C.So did I D.So I did
It was not ________ she took off her glasses ________ I realized she was a famous film star．
A.when; that B.until; that
C.until; when D.when; then
Every year, ________ makes the most beautiful kite will win a prize in the Kite Festival.
A.whatever B.whoever
C.whomever D.whichever
