第四章单元测试
This company was the first ____ portable radios as well as cassette tape recorders in the world.
The purpose of new technology is to make life easier, ____it more difficult.
I fell down and broke three of my teeth. I wonder how many times I have to come here and get my false teeth
the house on fire, he dialed 119.
Mark often attempts to escape ____ whenever he breaks traffic regulations.
It is our purpose in this section to introduce the basic meaning of the solution of a differential equation. 下划线部分在句中做 。
与电压源相连的灯形成一个简单的电路。
A lamp ____to a voltage source forms a simple circuit.
A:having produced B:producing C:produced D:to produce
答案:to produce
A:not making B:nor to make C:not make D:not to make
A:fixed B:fix C:to fix D:fixing
A:Being seen B:To see C:Seeing D:Having seen
A:having been fined B:being fined C:to have been fined D:to be fined
A:宾语 B:状语 C:主语 D:定语
A:to connect B:connecting C:connected D:connect
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