中国大学MOOC: Self-driving cars could drive people who are unable to drive themselves. They could travel without 7) _________ others.

How many tools we could use to communicate effectively? A: 5 B: 4 C: 7 D: 6

I________havebeenthere,butI________notfindtime. A: should;would B: should;could C: might;could D: could;could

Questions 1-4The text has 7 paragraphs (A-G).Which paragraph contains each of the following pieces of information How genes could cause a potential problem for conservationists.（）

Mary was so angry ______. A: that she could not speak B: and she could not speak C: so she could not speak D: but she could not speak

Jane have come to the party, but she not find the exact time. A: could; could B: might; could C: should; could D: should; would

Could you try on this dress? Could you ?

In fact, she had done all ( ) to help the poor. A: she could B: which she could C: what she could D: as she could

She ______ swim now, but she ______ swim one year ago. A: can; could B: could; could C: could; can D: can; couldn't

From a historical perspective, the US government, at critical moments, produced thousands of pages of new regulations, often spelling out in painstaking details_____________. A: what real estate could do and could not do B: what tourist spots could do and could not do C: what higher education institutions could do and could not do D: what businesses could do and could not do