We should make____a rule for us that the last to leave the classroom shall turn the light off.
| A.it | B.that | C.one | D.all | 
The role change of husband to father, although difficult, doesn’t seem so great as _____ of wife to mother.
| A.that | B.one | C.this | D.those | 
―John, I know nothing about playing tennis.I wonder if you could teach me.
 ―______ Just name the day.
| A.I’ m glad. | B.Go ahead. | C.If you want it. | D.With pleasure. | 
We ______ last night, but we went to the concert instead.
| A.must have studied | B.might study | 
| C.should have studied | D.would study | 
“ ______ as often as you can,” our English teacher often tells us, “ you will make rapid progress.”
| A.Practice | B.To practice | C.Having practised | D.Practising | 
. For miles around us there was nothing but a desert, without a single plant or tree ______.
| A.in the distance | B.at a distance | C.in sight | D.out of sight |