It remains __________ whether the medicine will work on the human body.
| A．seen |
| B．to seen |
| C．seeing |
| D．to be seen |
________ many changes have _______, we should keep pace with the changes too.
| A．Since; taken the place | B．Because; taken place |
| C．Now that; taken place | D．As; been taken place |
The fire spread through the hotel very quickly but everyone ______ get out.
| A．had to | B．would | C．could | D．was able to |
You can find many beautiful _____ ______ ten miles from here.
| A．scenery; in | B．views; within | C．scenes; beneath | D．spots; above |
He said it was this classroom _______ he found his lost watch and _____ he would take good care of it from then on.
| A．where; / | B．when; what | C．that; what | D．where; that |
I was in a hurry at that moment and I just _______ the door. ______, I didn’t have a clear idea what the door was like.
| A．stared at; Therefore | B．glared at; So |
| C．looked at; However | D．glanced at; Thus |