By the time Billy was 6, he in the sea.
| A．had already swum | B．was already swimming |
| C．has already swum | D．already swam |
There are many things in different areas ________ we can do to reduce the possible dangers of AIDS.
| A．where | B．there | C．what | D．that |
——Do you mind my opening the window? It’s a bit hot here.
—— ________ , as a matter of fact.
| A．Go ahead | B．Yes, my pleasure | C．Yes, I do | D．Come on |
All of the students were ______ by the ______ speech _______ by the leader.
| A．inspired; inspired; given | B．inspired; inspiring; gives |
| C．inspiring; inspired; given | D．inspired; inspiring; given |
. I have no idea _______ he left the party without _______ .
| A．why; noticing | B．how; being noticed |
| C．whether; notices | D．that; notice |
This job needs ______ patience and practice, after all, it will become ______ enjoyable experience after weeks.
| A．/ ; the | B．the ; the | C．/ ; an | D．the ；a |