—Who ________ be phoning us at this time of night?—It might be your sister.
In New Zealand , people live in the houses with their doors ______ north.
Sichuan is located ________ the west of China while Japan lies______ the east of China.
We agreed ______ here but so far she hasn’t turned up yet.
Beginning college is exciting:many of us can be easily overwhelmed by _______ details of running ________ well-balanced life.
Tom hid himself behind the door, _______ he rushed out to scare his mother.