Tim ____since he lost his job three weeks ago.
| A．had been unemployed | B．was unemployed |
| C．has been unemployed | D．has unemployed |
This writer’s books are devoted ___ children.
| A．in | B．to | C．on | D．about |
No matter what happens, you should stick ___ your word.
| A．in | B．to | C．on | D．into |
I think hard work can ___ success in the end.
| A．lead | B．lead to | C．lead into | D．lead of |
Worms like to dig tunnels ___.
| A．on earth | B．in the earth | C．in the world | D．on the earth |
The weather ___ hot, we all went to the seashore.
| A．is | B．are | C．was | D．being |