---When did you get to know each other ?
----It was in 2008___ we spent summer vocation together.
| A．that | B．when | C．before | D．since |
In many countries, some scientists are already _______ research in order to produce a cloned human baby.
| A．putting up with | B．coming up with |
| C．putting forward | D．pushing ahead with |
Edward, you play so well, but I you played the piano.
| A．don’t know | B．hadn’t know | C．didn’t know | D．haven’t known |
People often have this belief ______ development is bad for the environment, but this does not have to be true.
| A．that | B．which | C．where | D．how |
If we ______ the other road, we might have arrived here in time for the meeting.
| A．take | B．had taken | C．took | D．have taken |
Jessie, my best friend _______ me of some really bad things just to hurt me. I felt betrayed.
| A．accused | B．informed | C．reminded | D．warned |