The basic problem, however, is that there is no central control ______ the health system.A

I don’t think it necessary（discuss) _________the the problem is settled.

The process of urbanization has caused many problems, the major one is ______.A．economyB．t

Gas exchange, which is a basic part of the cycle of an internal combustion engine, is .A.t

What is the problem of Englands emergency health care services？A．The ambulances can"t take

Don’t worry. The problem is _____, and will be quickly overcome.A、unclearB、seriousC、mino

If we want to solve a problem the first step is t