时态和语态
(共3组，每组限时8分钟)
[一模题组]
1．(2013•大连第一次双基测试)in the past several weeks, many cities in northern china________ from heavy fogs, causing great inconvenience to people.
a．suffered b．have been suffering
c．were suffered d．had been suffered
解析：选b 考查时态和语态。句意：在过去的几个星期里，中国北方的许多城市一直遭受着浓雾天气，给人们带来了极大的不便。由“in the past sev
