-I want to see Mr. White. We have an appointment.
-I'm sorry, but he is not ________ at the moment, for the meeting hasn't ended.
busy
active
concerned
available
Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
why
where
how
when
______ birds use their feathers for flight, some of their feathers are for other purposes.
Once
If
Although
Because
-______ that company to see how they think of our product yesterday?
-Yes. They are happy with it.
Did you call
Have you called
Will you call
Were you calling
Every year, ______ makes the most beautiful kite will win a prize in the Kite Festival.
whatever
whoever
whomever
whichever
-Peter, please send us postcards ______ we'll know where you have visited.
-No problem.
but
or
for
so