It is thought that one billion people in the world, _______is half the word’s workers, earn their living by farming.
| A．if | B．that | C．which | D．what |
In this picture the tree is casting a __________ on the ground.
| A．shade | B．shadow | C．shape | D．figure |
I have battled with my _________ over whether I should actually send this letter.
| A．awareness | B．consciousness | C．conscience | D．mind |
There is no doubt that all this puts a large _________ on a teacher with a large number of classes.
| A．tax | B．catastrophe | C．sense | D．burden |
You promised to ____________ the goods to our place immediately,but we haven’t seen any of them yet.
| A．pass | B．relay | C．deliver | D．release |
The situation is ________—we have no food,very little water and no medical supplies.
| A．desperate | B．adventurous | C．deserted | D．various |