【单选题】【消耗次数：1】
She has worked here_______many years.
①
since
②
for
③
during
参考答案：
复制
纠错
相关题目
【单选题】
The population of many Alaskan cities has __________ doubled in the past three years.
①
larger than
②
as great as
③
more than
④
as many as
【单选题】
Our factory has ____ for years.
①
many fire equipments
②
much equipment of fire
③
many equipments of fire
④
much fire equipment
【单选题】
—Are you a teacher?—No, but I ________. I worked in a middle school for three years.
①
am
②
will
③
do
④
was
【单选题】
—Are you a teacher?—No, but I ________ once. I worked in a middle school for three years.
①
am
②
will
③
do
④
was
【判断题】
Before he began to study in the university, he had worked in a company for three years.
①
正确
②
错误
【单选题】
The professor has been [填空]at the university for over thirty years.
①
teach
②
taught
③
teaching
④
will teach
随机题目
【单选题】
有关资源分配图中存在环路和死锁关系正确的说法是（）
①
图中无环路则系统可能存在死锁
②
图中有环路则系统肯定存在死锁
③
图中有环路则系统可能存在死锁，也可能不存在死锁
④
以上说法都不对