Choose the proper form of the verb. 1. Beginning in 1965, the integrated circuit to replace the transistor in machines now called third-
generation computers.
a) have begin b) beginning c) begin d) began
2. Silicon because it is semiconductor.
a) is used b) are used c) will have used d) would used
3. He the machine the Difference Engine because it worked by solving what mathematicians call
“difference equations”.
a) will call b) call c) called d) calls
4. Also in 1962 the first removable disc pack .
a) marketed b) will marketed c) was marketed d) were marketed
5. A trackball a stationary device to the mouse.
a) is related b) has related c) have been related d) will related
6. All these new developments the second generation of computers less costly to operate.
a) maded b) will marketed c) made d) make

Polinaklass12    1   04.12.2020 12:58    0