Although ______ the support of the banks, Mike managed to save his company with the help of his friends.
A. lacking B. lacked C. being lacking D. being lacked
高二英语单项填空简单题
Although ______ the support of the banks, Mike managed to save his company with the help of his friends.
A. lacking B. lacked C. being lacking D. being lacked
高二英语单项填空简单题查看答案及解析
Although the country has had political independence for over a century,_______ it needs support of its neighbors..（ ）
A．naturally B．fortunately
C．particularly D．economically
高二英语单项填空简单题查看答案及解析
Not until we saw the manager did we know that the bank ________the company for the purpose of reducing its borrowings.
A. took part in B. caused damage to
C. put pressure on D. drew attention to
高二英语单项填空简单题查看答案及解析
Although she has a lot of problems, she managed to remain ________ .
| A．optimistic | B．cautious | C．concert | D．anxious |
高二英语单项填空简单题查看答案及解析
Although the entrance to the cave was very narrow, those visitors managed to________through it.
A．press B．squeeze C．break D．cut
高二英语单项填空中等难度题查看答案及解析
Although the entrance to the cave was very narrow, those visitors managed to________through it.
A．press B．squeeze C．break D．cut
高二英语单项填空中等难度题查看答案及解析
Mike ______have stolen the money from the bank,______he appeared to be rich overnight.
A. can’t; for B. might; for C. must; since D. can’t; since
高二英语单项填空中等难度题查看答案及解析
The managing director was to _______ the accident, although it was not his fault.
A. be blaming for B. be blamed on C. blame for D. blame on
高二英语单项填空中等难度题查看答案及解析
Busy _______ he was, he managed to spare some time to help plan the project.
A. while B. although C. as D. when
高二英语单项填空中等难度题查看答案及解析
Salty water just below the surface of Mars could hold enough oxygen to support the kind of microbial （微生物的） life that existed and developed quickly on Earth billions of years ago， researchers reported on Monday.
In some locations， the amount of oxygen available could even keep alive a primitive， multicellular （多细胞的） animal such as a sponge （海绵动物）， they reported in the journal Nature Geosciences. "We discovered that brines-water with high concentrations of salt - on Mars can contain enough oxygen for microbes to breathe，" said lead author Vlada Stamenkovic， a theoretical physicist at the Jet Propulsion Laboratory in California. "This fully revolutionizes our understanding of the potential for life on Mars， today and in the past. "
Up to now， it had been assumed that the trace （微量） amounts of oxygen on the Red Planet were insufficient to sustain even microbial life. "We never thought that oxygen could play a role for life on Mars due to its rarity in the atmosphere， about 0.14 percent，" Stamenkovic said. By comparison， the life-giving gas makes up 21 percent of the air we breathe.
On Earth， aerobic-that is， oxygen breathing -life-forms evolved （净化） together with photosynthesis （光合作用）， which converts CO2 into O2. The gas played a critical role in the existence of complex life， known after the so-called Great Oxygenation Event some 2.35 billion years ago.
But our planet also holds microbes -at the bottom of the ocean， in boiling hot springs -that live in environments lack of oxygen. "That's why -whenever we thought of life on Mars -we studied the potential for anaerobic （无氧的）life，" Stamenkovic said.
1.The underlined word "insufficient" in Para. 3 means " ______ ".
A.enough B.not enough
C.wrong D.right
2.Vlada Stamenkovic may agree that ______ .
A.this research changes people's understanding of the potential for life on Mars
B.the life-giving gas makes up 31 percent of the air people breathe on earth
C.Great Oxygenation Event happened some 2.35 million years ago
D.earth holds microbial life at the bottom of the desert
3.The main idea of the passage is ______ .
A.Mars is fit for living
B.multicellular animals are living on Mars
C.oxygen plays a role for life on earth
D.Mars is likely to have enough oxygen to support life
高二英语阅读理解困难题查看答案及解析