Identify one mistake in the following sentences:
Mined over 2,000 years ago, copper is one of the earliest know metals.
A.mined
B.ago
C.the
D.know

Choose the best option
Everyone in both cars _____ injured in the accident last night, ______?
A.were/weren't they
B.was/weren't they
C.was/wasn't he?
D.were/were they

Choose the best option
The more he tried to explain, ______ we got.
A.the much confused
B.the many confusing
C.the more confusing
D.the more confused

Choose the best option
If you hadn't stayed up so late last night, you ______ sleepy now.
A.wouldn't have felt
B.wouldn't feel
C.wouldn't fell
D.wouldn't have fallen

______(26)
A.has risen
B.rose
C.has raised
D.raised

_______(28)
A.a
B.some
C.the
D.any

______(30)
A.should be
B.is being
C.had been
D.can be

_____(31)
A.unless
B.if
C.provided
D.as long as

______(33)
A.so much
B.so
C.such an
D.such

When the teacher asked Amanda what the chemical formula was, her mind was a total______
A.void
B.empty
C.nothing
D.blank