Edison never gave up, ________ he failed many times.
[ ]
A．and B．though C．or
－Bill, is this your book?
－Yes, it's ________.
A．yours B．his C．mine
My father will be back from Beijing ________ a week.
A．for B．in C．after
－Do you have ________ bike?
－Sorry, I don't have one.
A．a B．the C．不填
Which of the following signs has nothing to do with traffic?
Among the four words “already, beach, break, idea”, the underlined parts(划线部分) have ________ kinds of pronunciation(发音).
－Did you pass the physics test?
－No. Many of the problems were so difficult ________ few of us could do them.
－What do you think we should do with the bag?
－Stop the traffic, move the bag away, and then let the traffic ________ again.
－I think both pairs seem all right to you.
－But I really don't know ________ to buy.
－How about your parents?
－So far there ________ no word from them.
