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她在演讲比赛中失利，原因是她太紧张了。

Her failure in the speech contest was ________ her nervousness．

(1)He ________ every room in the house．

(2)Professor Li is ________ into the effect of smoking on health．

(3)Scientists are still ________ a cure for the common cold．

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He stared at the words ________(困惑不解地)．

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我不知道该如何应付这种新局面。

I’m ________ as to how to deal with the new situation．

观察下面句子中的画线部分并将其译成汉语。

I haven’t been sleeping well since I returned home．

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观察下面句子中的画线部分并将其译成汉语。

Police in America have stepped up their search for a fifteen-year-old boy who went missing two days ago in Dover, New Hampshire．

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观察下面句子，试着归纳其画线部分所包含的句型结构。

They say that the footprints could have been made by bears or other animals．

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观察下面句子，试着归纳其画线部分所包含的句型结构。

We will not give up until we find convincing evidence．

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观察下面句子，试着归纳其画线部分所包含的句型结构。

Standing inside were lots of white-skinned, strange-looking creatures with large black eyes．

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观察下面句子，试着归纳其画线部分所包含的句型结构。

Justin’s sister, Kelly, says she heard her brother return home at about 11 p. m．

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