The ______ a teacher has on children is usually greater than that of their parents.
| A．use | B．effort | C．effect | D．energy |
I will never understand how it that you were an hour late on such a short journey.
| A．came about | B．came across | C．came out | D．came up with |
About 270 million people in rural areas in China have no to safe drinking water.
| A．entrance | B．access | C．solutions | D．sources |
I sooner but I didn’t know that they were waiting for me.
| A．had come | B．was coming | C．would come | D．would have come |
is known to us all is that the 2012 Olympic Games will take place in London.
| A．As | B．What | C．That | D．It |
Was it because of the heavy snowstorm in Europe the flight had to be put off?
| A．which | B．so | C．why | D．that |