1.It is said some flying things have visited the earth from _______ other worlds in _______ space.
A.the...the
B.the.../
C./...the
D./.../
2.There is ________ "s" in the word "stone".
A.a
B.an
C.the
D./
3.________ space plane looks like ________ ordinary plane.
A.A...a
B.A...an
C.An...an
D.The...a
4.________ young should help _________ old.
A.The;the
B.The;a
C.A;the
D.A;a
5.________birds/Birds can fly very high in _______ sky.
A./...the
B.The...the
C./...a
D./.../
6.Bob hit ________ .
A.Tom's face
B.Tom on the face
C.Tom in his face
D.Tom in the face
7.There is ________ 800-meter-long bridge over the river.
A.an
B.a
C.the
D./
8.Our knowledge of ________ universe is growing all the time.
A.an
B.a
C.the
D./
