—Sorry，do you mind if I smoke here?
—Yes，________.
| A．you could | B．go ahead |
| C．I do | D．my pleasure |
—Is there a letter for me?
—Yes, came for you this morning.
| A．that | B．it | C．one | D．the letter |
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
| A．what | B．which | C．where | D．who |
He sent me an e-mail, ______ to get some further information for his research.
| A．hoping | B．hoped | C．to hope | D．hope |
_______ is our belief that improvement in health care will lead to a stronger, more prosperous economy
| A．As | B．That | C．This | D．It |
If she ________ medicine earlier, she _______ ill now.
| A．takes; won’t be | B．took; wouldn’t be |
| C．had taken; wouldn’t have been | D．had taken; wouldn’t be |