Obama was elected ____ first black president of the United States four years ago and has been elected _____ president again for the next four years.
| A．the; the | B．the; X | C．X; the | D．a; a |
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 |
I go _____ to the stadium when there’s a game, but usually I watch it on TV.
| A．forwards | B．eventually | C．frequently | D．downtown |
.In the time ____ takes to drink a cup of coffee, customers can get a pair of special-made shoes in this store.
| A．it | B．one | C．that | D．when |