单词拼写。

1．How many parents does a ________ (克隆的) animal have?

2．Do you think it will be ________ (有益的) to humans?

3．He ________ (犹豫) before he answered because he didn't know what to say.

4．Drivers should be ________ (惩罚) severely for dangerous driving.

5．In which ________ (方向) are you going,north or south?

6．It was so cloudy that the top of the mountain was ________ (看不见的)．

7．I felt very ________ (震惊的) at the news that Germany invaded Poland this morning.

8．I am ________ (迷惑的) now.Which one will I buy?

9．We will ________ (面对) many difficulties and troubles in our daily life.

10．They dropped in for a ________ (聊天) last night.

先心病患儿右心房轻度增大，右心室显著增大，右心室血氧含量正常但压力增高，肺动脉压力降低。诊断考虑（）

A.肺动脉狭窄

B.动脉导管未闭

C.法洛四联症

D.房间隔缺损

E.室间隔缺损