19
[填空题,5分] I think it necessary for him ________ (finish) the work in time.
出自:信阳师范学院英语语音.

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块