第四章测试1.
This company was the first ____ portable radios as well as cassette tape recorders in the world.
A:producing B:produced C:having produced D:to produce
答案:D
2.
The purpose of new technology is to make life easier, ____it more difficult.
A:nor to make B:not to make C:not make D:not making 3.
I fell down and broke three of my teeth. I wonder how many times I have to come here and get my false teeth
A:to fix B:fixing C:fixed D:fix 4.
the house on fire, he dialed 119.
A:Seeing B:Having seen C:Being seen D:To see 5.
Mark often attempts to escape ____ whenever he breaks traffic regulations.
A:to have been fined B:being fined C:to be fined D:having been fined 6.
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 。
A:状语 B:主语 C:宾语 D:定语 7.
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:connected B:connect C:to connect D:connecting
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