[单选题]We can infer by this label that ______.

正确答案 ：A

the medicine could cause some people to feel nervous

解析：解析：B和C选项的内容与原文不符，属于错误信息；D选项内容也不正确，这种药为tablet意思为“药片”，本身并不是液体。A选项的内容可以由短文的最后一个句子“Reduce dosage if nervousness，restlessness，or sleeplessness occurs.”所确认。

[单选题]When the manager told her that she was the lucky customer, Mrs. White would be ______.

正确答案 ：C

rather sad

解析：解析：本题为一道推理题。由于仅仅是她忘买的茶是免费的，其价值不值一提，所以她应该感到失望。

[单选题]Maggie ran back to the kitchen, eggs ______ carefully in her hands.

正确答案 ：B

held

解析：解析：该句为独立主格结构，后半部分是eggs being held 的省略形式。

[单选题]Science is still ______ of the causes of many kinds of cancer.

正确答案 ：A

ignorant

解析：解析：ignorant可以指“无学识的，愚昧的”，还指“不知道的”；unconscious意为“失去知觉的，不省人事的；无意识的”；conscious意为“有知觉的，意识到的”；informed意为“获悉，告知”。

[单选题]Guest: Oh, I hadn't realized how late it was. I'm afraid I'll have to be going. Host: Oh, not yet. I'm just going to make some coffee. Guest: ______ , though I'd really love to stay. I've got to be up by six tomorrow morning, unfortunately. Thank you for a wonderful party.

正确答案 ：A

I'm sorry, but I must

解析：解析：主人诚心挽留，客人坚持要走。由于不能接受主人的好意，客人应表示歉意，故而选择A．I'm sorry，but I must比较合理。其他选项使用场合不当。

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