— Have you seen ____ pencil? I left it here this morning.
—Is it _____black one? I think I saw it somewhere.
|
A.a; the |
B.the; the |
C.the; a |
D.a; a |
As many as 100 species of fish, some ____ to these waters, may have been affected by the pollution.
|
A.relevant |
B.immune |
C.unique |
D.convenient |
—Did Hans take part in the contest?
—No, at the last moment his courage _____ him and he ran away.
|
A.ignored |
B.declined |
C.failed |
D.lost |