____ the morning of my mother’s birthday, I usually help my mother do some housework.
| A．In | B．At | C．During | D．On |
If you don’t explain clearly, you will just _______ the reader.
| A．confuse | B．satisfy | C．intend | D．remind |
Gun control is a subject ________Americans have argued for a long time,
| A．of which | B．with which | C．into which | D．about which |
Before the tourists set off , they spent much time setting a limit _____ the expenses of the trip.
| A．in | B．for | C．to | D．about |
The public transportation is very convenient in that big city , so there______be any difficulty in
traveling around .
| A．mustn’t | B．wouldn’t | C．shouldn’t | D．needn’t |
_____ is known to us is that the 2012 Olympic Games will take place in London．
| A．It | B．Which | C．As | D．What. |