This morning I picked up wallet in surprise on my way to school.
| A．A;a | B．the;a | C．a;\ | D． \;the |
--Did a letter come for me?
--Yes, ___ came for you this morning.
| A．that | B．it | C．one | D．the letter |
He is determined to devote himself to ___ the country.
| A．serve for | B．serve | C．serving for | D．serving |
Whenever we were ___, he is always ready to ___ us some help.
| A．in the trouble; give | B．in trouble; offer | C．in a trouble; pay | D．in trouble,take |
The way ___ you are doing it is completely crazy.
| A．in that | B．by which | C．in which | D．for that |
The potato is a plant ____ in places ____ it is too cold to grow some other plants.
| A．grown; where | B．to grow; that | C．growing; where | D．grown; that |