【C2】A．quicklyB．suddenlyC．occasionallyD．expectedly

A．quicklyB．cleverlyC．virtuallyD．safely

【C15】______A．temporarilyB．suddenlyC．permanentlyD．sharply

Breakthrough pain is a pain that______.A．lasts a long timeB．strikes and ends suddenlyC．is

I catch a cold 【now and then】 .A. alwaysB.occasio

I catch a cold 【now and then】.A. alwaysB. occasio

I catch a cold 【now and then】.A. alwaysB. occasio