定义在R上的函数f（x）满足及f（-x）=f（x），则f（x）可以是（ ）
Do you like watching ping﹣pong matches？
Yes，and ________ favorite ping﹣pong player is Ma Long．（ ）
we
us
our
ours
Our reading club shares ideas with each other ________ one hour every Tuesday．（ ）
A．toB．onC．atD．for
Mary wants to be ________ good doctor when she grows up．（ ）
a
an
the
/
Do you know ？
Yes．They're from new York．（ ）
what do the tourists do
where the tourists are from
what the tourists do
where are the tourists from
The Smiths have decided a house near the sea．（ ）
buy
bought
buying
to buy
及f（-x）=f（x），则f（x）可以是（ ）
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