They __ on the program for almost one week before I joined them, and now we _on it

They ______ on the program for almost one week before I joined them, and now we _____on it as no good results have come out so far.

A. had been working; are still working B. had worked; were still working

C. have been working; have worked D. have worked; are still working

答案

解析:

略

相关题目

Dear Editor, I have just returned home after studying for a year in Ger

Dear Editor, I have just returned home after studying for a year in Germany. But it seems that my parents don’t understand me now. They expect me to be the same person I was before I went

（09年东台市期末）如图所示，放在水平地面上的物体M上叠

（09年东台市期末）如图所示，放在水平地面上的物体M上叠放着物体m(m＜M)，m与M之间用一原长为L，劲度系数为k的轻弹簧连结起来，M与地面和m与M之间

分类是重要的化学学习方法。下列对应关系正确的是（

分类是重要的化学学习方法。下列对应关系正确的是（） A．混合物——液氯、漂白粉 B．碱性氧化物——Al2O3、Na2O2 C．强电解

“两会”期间，人民网、新华网等网站适时推出了参会代表

“两会”期间，人民网、新华网等网站适时推出了参会代表、委员的博客群。在代表、委员的博客上，公民可以“键议”天下，发表网友“社论”。这

A Jian 10（Fighter-10）, China's most advanced military jet, made su

A Jian 10（Fighter-10）, China's most advanced military jet, made successful landing after engine failure．A．a；an B．不填；an C．a；the D．the

若离散型随机变量ξ的分布列为 ξ01 P9c2－c3－8c 则常数c的

若离散型随机变量ξ的分布列为 ξ01 P9c2－c3－8c 则常数c的值为__________.

读下图某地区的经纬网和等高线图回答图中B地区的经济作物

读下图某地区的经纬网和等高线图回答图中B地区的经济作物和林木主要为A．甘蔗、柑橘 B．甜菜、柑橘 C．花生、苹果 D．棉花、茶树

下列哪些消化液经过消化腺分泌后直接注入小肠 ① 唾

下列哪些消化液经过消化腺分泌后直接注入小肠 ① 唾液 ② 胃液 ③ 胰液 ④ 胆汁 ⑤ 肠液 A ①②③④⑤ B ②③④⑤ C ③④⑤ D

They ______ on the program for almost one week before I joined them, and now we _____on it

答案

相关题目

最新题目

They __ on the program for almost one week before I joined them, and now we _on it