[单项选择]Jonnie was not barely able to walk without help because of the bad injury in his left leg.（　）
A. was not
B. without help
C. because of
D. bad

[单项选择]Jonnie (was not) barely able to walk (without help) (because of) the (bad) injury in his left leg.


A. was not
B. without help
C. because of
D. bad

[单项选择]The secretary will be able to help employees ______ long reports.
A. type
B. typed
C. typing
D. to be typed

[单项选择]I will be able to help you （）I finish my work
A. as   
B. because 
C. while  
D. once

[单项选择]I wish I（）able to help you. But the problem is that I am too busy to spare even one minute.
A. am
B. will be
C. were
D. shall be

[单项选择]C The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid --- we simply weigh too much, and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink. However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicus basilicus, a lizard（蜥蜴）native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water’s surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we’ll need huge feet that we could bring up to our ears in order to create adequate “hitting.” But fortunately there is an alternative: cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “non-Newtonian” li
A. are not interested in it
B. have biological limitations
C. have not invented proper tools
D. are afraid to make an attempt

[单项选择]（　）for your help, we'd never have been able to finish the work.
A. Hadn't it been
B. Had it not been
C. It was not
D. If it had been not

[单项选择]______ for your help, we' d never have been able to get over the difficulties.
A. Had it not
B. If it were not
C. Had it not been
D. If we had not been

[单项选择]______for your help, we' d never have been able to get over the difficulties.


A. Had it not
B. If it were not
C. Had it not been
D. If we had not been

[单项选择]Walk a Quarter-Mile or Die 　　If you can walk a quarter-mile,odds(可能性)are you have at least six years of life left in you,scientists say.And the faster you can(51)it,the longer you might live. 　　While walking is no guarantee of(52)or longevity(长寿),a new study found that the ability of elderly people to do the quarter-mile was an“important determinant(决定因素)”in whether or not they’d be(53)six years later and how much illness and disability they would endure. 　　“The(54)to complete this walk was a powerful predictor of health outcomes,”said study leader Anne Newman of the University of Pittsburgh School of Medicine.“In fact,we(55)that the people who could not complete the walk were(56)an extremely high risk of later disability and death.” 　　Newman and colleagues recruited nearly 2,700 white and African-American men and women aged 70 to 79 to(57)the walk.All the participants were screened and determined to be in relatively(58)health,and they had all said they had previously walked th
A. increased
B. faced
C. carried
D. avoided