【C19】A．partly becauseB．mainly becauseC．not becauseD．not because of

The main moving parts of a diesel engine consist of the _____ and the pistons.

The main rivers parting in Britain run from ______.A．north to southB．south to northC．east

Who will mainly handle the negotiation during store and spare parts transaction？A.Chief en

What are the speakers mainly discussing？A．An experiment in Antarctica.B．Part of the Larsen

【C19】A．erosion "B．facilitationC．difficultiesD．limitation

Which of the following is NOT in the eastern part of the USA？A．Massachusetts.B．Maine.C．Nor