[单选题]
________at his model plane over the weekend，he didn’t complete it．
A、As he worked hard
B、Hard as he worked
C、How he worked hard
D、How hard he worked

[单选题]
__________
A、paid
B、to be paid
C、pay
D、paying

[单选题]
The boy showed complete_________of his parents，advice．
A、disregard
B、ignorance
C、neglect
D、avoidance

[单选题]
“呕出一颗心来，——在我心里!”此诗句出自（　　）
A、郭沫若《炉中煤》
B、艾青《我爱这土地》
C、闻一多《发现》
D、徐志摩《再别康桥》

[单选题]
胸骨左缘第3～4肋问搏动（　　）
A、正常青年人
B、右心室肥大
C、腹主动脉瘤
D、左心室肥大
E、升主动脉瘤

[单选题]
The reason why all the solar energy falling on the earth can’t be utilized is that ______．
A、only a very small part is available
B、the sun is too distant from the earth
C、it takes thousands of years for this energy to be stored up in coal and oil
D、our scientific knowledge is not sufficient