We were about to leave the classroom _____ it began to rain.
| A．while | B．when | C．as | D．before |
We go to school from Monday to Friday, and go to ___ cinema on Saturday or Sunday.
| A．a | B．the | C．an | D．/ |
____ horse is ___ useful animal.
| A．A, an | B．The, the | C．A, the | D．The, a |
This Sunday I'll go swimming with___.
| A．the Smith brothers | B．the Smith’s brothers | C．the Smiths brothers | D．the brothers of Smith |
___Mr. Smith is calling on the phone, sir.
| A．The | B．A | C．One | D．An |
Licoln said that ___ living must finish the work of those dead.
| A．the | B．every | C．a | D．all |