.He walked down the hills, _______ softly to himself.A．sing　　B．singing　　C．sung

题型：不详难度：来源：

.He walked down the hills, _______ softly to himself.

A．sing　　

B．singing　　

C．sung　　

D．to sing

答案

解析

略

举一反三

The graduating students are busy _______ material for their reports.

A．collect　

B．to collect　

C．collected　

D．collecting

题型：不详难度：| 查看答案

.The cars _______ in Beijing are as good as those _______ in Shanghai.

A．produce, produce	B．produced, produced
C．produced, producing	D．producing, producing

题型：不详难度：| 查看答案

_______ a satisfactory operation, the patient recovered from illness very quickly.

A．Having been given

B．Having given　

C．Giving 　　　

D．Being given

题型：不详难度：| 查看答案

_______ a satisfactory operation, the doctor believed the patient would recover from his illness very soon.

A．Having been given

B．Having given　

C．Giving 　

D．Being given

题型：不详难度：| 查看答案

He wrote a letter to me _______ that his trip to Japan had been put off because of the bad weather.　

A．inform 　

B．informing　

C．informed 　　

D．being informed

题型：不详难度：| 查看答案