As a businessman, Mr. Green is a complete failure. Being lazy may well be one of the______to his success.
| A．drawbacks | B．shortcomings | C．disadvantages | D．barriers |
Many workers were organized to clear away ________ remained of the World Trade Center.
| A．those | B．that |
| C．what | D．where |
Some of the scientists held the point________ the book said was right.
| A．what; what | B．that; that |
| C．what; that | D．that; what |
Was it ________ the conference of APEC that made Shanghai the focus of the world then?
| A．holding | B．to hold |
| C．held | D．having held |
Use your head. nothing taught by others can have the same effect on you as ________learned by yourself．
| A．those | B．what |
| C．that | D．the one |
________swallow（燕子）doesn’t make ________ summer.
| A．One; a | B．One ; ／ |
| C．A; the | D．A; ／ |