【C3】A．formalB．continualC．regularD．circular

A．randomB．rareC．regularD．rough

【C13】A．continuousB．continualC．constantD．consequent

【C17】A．intenseB．professionalC．regularD．strict

The most easiest process for mining gold is panning, which involves using a circular dish

The style. of "See ya, buddy!" is______.A．formalB．consultativeC．frozenD．intimate

【C4】A．seriousB．difficultC．regularD．convenient