题目内容
—Is he often heard ________ in his room?—Yes. I often hear him ________ in his room,
Listen! Now we can hear him ________ again. ( )
A．sing; sing; sing
B．to sing; sing; singing
C．sing; to singing; sing
D．singing; to sing; sing
答案：B
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—I'm a teenager's mother. Sometimes I don't know ____.
—Maybe he suffers from stress.
| A．what does my son want to get | B．what my son needs most |
| C．why is my son often angry | D．why my son gets angry very oft en |
