题目内容
（请给出正确答案）
A、should not be
B、mustn't have been
C、mustn't be
D、can’t be
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更多“There is no light in the room.…”相关的问题
A hollow-cathode lamp is( )
A．a narrow-band light source B．a broad-band light source
C．a light detector D．not a light source
A light used to signal passing intentions must be an ______.
A.all-round yellow light only
B.all-round white light only
C.all-round blue light only
D.alternating red and yellow light
A.to have a little light music
B.having a little light music
C.have a little light music
D.if they have a little light music
