用单词的正确形式填空。

1. l'm eager _   __  (join)the art club.

2. He promised_     __(wait) for me at the gate of our school.

3. Having read Unit 5,I went on___   _(read) Unit 6.

4. After a short break he went on       _  (write) the letter.

5. She spent about half an hour    __    (send) the messages to her friends.

下列有关发绀伴随症状的描述不妥的是

A．发绀伴呼吸因难常见于重症心、肺疾患

B．发绀伴呼吸因难常见于急性呼吸道阻塞、气胸

C．先天性高铁血红蛋白血症有明显的发绀及呼吸困难

D．发绀伴杵状指(趾)见于慢性肺部疾病

E．发绀患者急性起病伴意识障碍和衰竭见于休克