.
This bag is twice ______ weight of that one. You’d better carry ______ lighter one of the two.
| A．/; / | B．a; the | C．the; the | D．the; a |
What makes online shopping so popular is it shortens the distance between manufacturers and consumers．
| A．how | B．that | C．whether | D．why |
Nelson Mandela is，__________ the greatest man of the 20th century，certainly among the most extraordinary leaders．
| A．if there | B．if any | C．if not | D．if so |
I __________ glasses since I was in primary school and I hate them. They make me look like a bookworm.
| A．have worn | B．have been wearing | C．have been worn | D．was wearing |
You fool! You __________ all the people in the car yesterday if it had not been for me．You were so drunk while driving!
| A．could kill | B．might have killed |
| C．had killed | D．should have killed |
Things have changed quickly over the past decade and life in the country is much better than ___used to be.
| A．that | B．what |
| C．it | D．one |