Professor Smith，along with his assistants，___________ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
Many kinds of animals and plants die ____ every year.
A down B away C out D from
I can’t tell you the exact time. I’ll get there, maybe at eight or nine or even later. ____, I’ll be there as early as I can.
| A．Anyhow | B．However | C．Thus | D．Therefore |
It was in the rice fields ____ we had our league meeting.
| A．where | B．that | C．in which | D．on which |
--Have you moved into the new house? ---Not yet, the rooms ______.
| A．are being painted | B．are painting | C．are painted | D．are being painting |
—It is strange that Dave didn’t respond________any of my emails.
—Something must have happened to him.
| A．on | B．with |
| C．for | D．to |