The introduction of modern technique from abroad makes it necessary for skilled workers to ____ unskilled workers. A) take place B) take over C) take down D) take the place of

problem with their conditioning Mr. Henry purchsed Their conditioning filter wsn’t replced. B．The thermostt ws turned down too low. C．The freon pressure ws lower thn norml. D．The fn motor ws out of order.A．The air conditioning filter wasn’t replaceDB．The thermostat was turned down too low．C．The freon pressure was lower than normal．D．The fan motor was out of order．