问题

The experts were doing their experiment in the lab, ______ what happened outside. [ ]
A: didn't know
B: not knew
C: not knowing
D: having not known
B: not knew
C: not knowing
D: having not known
正确答案是:
同类题型
Finding a new job as an operator was the reason _______ I moved.
constantly exposed to advertisements isannoying, but it ______ be pleasant sometimes
下列各项中对相同句式的分类正确的一项是( ) ①农人告余以春及 ②《齐谐》者,志怪者也。 ③彼且奚适也 ④杨意不逢 ⑤都督阎公之雅望 ⑥访风景于崇阿 ⑦今臣亡国贱俘 ⑧而莫之夭阏者
______–I’ve just make a model robot for our class project
You don’t need an invitation to help others. Give help _____you are asked.