She will sing a song she is asked. A.if B.unless C.for D.since
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She will sing a song ____ she is asked.
| A.if | B.unless | C.for | D.since |
试题答案
【答案】
A
【解析】略

She will sing a song ____ she is asked.
| A.if | B.unless | C.for | D.since |
【答案】
A
【解析】略