We spend about an hour a day . |
A. do our homework B. doing our homework C. do our homeworks D. doing our homeworks |
The old man lives _____ the _____ floor. I often go there to look after him. |
A.in; two B.on; second C.under; second D.to; second |
There _____ a stone horse and several chairs on the second floor of this building. |
A.am B.is C.are D.be |