根据短文内容和所给中文提示，写出空白处各单词的正确形式。每空限填一词。

     I went to the summer camp for my 1______ (假日) yesterday. I went there 2______ (和…一起) my

classmates and a guide. We stayed in the tent 3______ (而不是) of hotel because the hotel was too 4______

(昂贵). And we cooked meals ourselves. In the afternoon it began to 5______ (下雨). We had to 6______

(逗留) in the tent. It made us feel very 7______ (不高兴). The people were unfriendly. The camp was really

 8______ (枯燥, 乏味), so we decided to go home. We got up at 5:00, left at 5:30 and 9______ (到达) home

at 8:30. I was 10______ (疲惫) and hungry when I got home. I ate lots of delicious food and then had a good

sleep.

在X线摄影中，使用对比剂可以增加组织间的对比，有助于形成影像。

逆行肾盂造影对比剂用量是一侧注射（）

A.2ml

B.5～7ml

C.8～15ml

D.20ml

E.80～100ml