______, all machines are combinations of simpler parts such as the lever, the pulley, and

Most of the machines in the workshop______ next month.A．are repairedB．have been repairedC．

—Could you give methe brochure for that machine？— ________________A、Yes, here you are.B、

Frey and Osborne are most likely to agree that______.A．machines cannot do the jobs cheaply

either you or I ________able to design the machine. A. is B. has been C. are to be D. a

Factories are supplied with______machines.A．plenty ofB．a great deal ofC．large number ofD．v

______ are that new machine will arrive tomorrow.A．OpportunitiesB．OccasionsC．ChancesD．Time