He put up a map ___ the back wall because there was a hole ___ it. |
A. on; on B. at; in C. on; in D. on; at |
Jiangsu is ___ the east of China, but Japan is ___ the east of China. |
A. to; in B. in; to C. on; to D. to; on |
Tom sits ____ the classroom while John sits ____ the room. |
A. in front of; at back of B. in the front of; at the back of C. in front of; at the back of D. in the front of; at back of |
Seen from ___, the earth appears to be a big blue ball. |
A. the space B. space C. a space D. this space |