As he reached ________ front door,Jack saw ________ strange sight.(2011·大纲全国,16)
She needs the work ____ before tomorrow.
--Did a letter come for me? --Yes, ___ came for you this morning.
He is determined to devote himself to ___ the country.
Whenever we were ___, he is always ready to ___ us some help.
The way ___ you are doing it is completely crazy.