---There must be a dozen pens in this house but I can never find one when I need one.
--- Keep looking. ______ is sure to turn up.
| A．One | B．It | C．That | D．This |
Visitors were struck by the natural _________ here, which was beautiful beyond description.
| A．resource | B．scenery | C．disaster | D．element |
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 |