Neptune is about thirty times as far from the Sun _________

单选题 Neptune is about thirty times as far from the Sun __________

A．is the Earth
B．the Earth is
C．is as the Earth
D．as is the Earth

参考答案D

解析: D。海王星与太阳的距离大约是地球与太阳距离的z--t-倍。考查比较结构。本题是同级比较，应用as far…as结构，故可以排除选项A和B；第二个as在句中作连词，其后应接句子，结合选项只有D符合。

单选题 Thomas Edison seemed to be awkward in his childhood．

A．a great inventor
B．was a great inventor
C．a great inventor who
D．who, as a great inventor

单选题 In less than two weeks, I

A．will graduate
B．am graduating
C．have graduated
D．will have graduated

单选题 If we __________ the oil company to build this paper mill, we __________ water pollution now．

A．had not allowed, would not have
B．had not allowed, would not have had
C．didn't allow, would not have
D．didn't allow, would not have had