—Listen! Is that Pingping playing the guitar?
—No. It __________be Pingping. He has gone to Beijing.
| A．mustn’t | B．may | C．can’t | D．must |
—Listen! Is that Pingping playing the guitar?
—No. It __________be Pingping. He has gone to Beijing.
| A．mustn’t | B．may | C．can’t | D．must |
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