The machines are made _____ at full speed.A.workB.workingC.to workD.to be worked

The president made a _______ speech at the opening

The president made a _______ speech at the opening

The president made a _______ speech at the opening

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

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

We are _______ at the rapid progress Mark has made in this semester.A.distinguishedB.annoy