Tom has been here ________just one year, but his father has worked here
________ ten years ago.
| A．since; for | B．since; since |
| C．for; since | D．for; / |
________ time went by, we became best friends.
| A．When | B．While | C．With | D．As |
Look, it is ____________so _______________.
| A．snowing; big | B．snows ; heavily |
| C．snowing; heavy | D．snowing; heavily |
Many birds fly away because plants die and insects hide_____ coldness_______ winter.
| A．away; in | B．from; in |
| C．away; on | D．from; on |
It will be __________ tomorrow and there will be much___________.
| A．rainy; wind | B．rain; windy |
| C．rain; wind | D．rainy; windy |
We should do everything we can ________ the birds__________danger.
| A．to protect; away | B．protecting; in |
| C．to protect; in | D．protected; from |