It is a common in the USA that you should make an appointment if you want to see a doctor.
| A．rule |
| B．sense |
| C．practice |
| D．habit |
From space, the earth looks blue. This is _______ about seventy-one percent of its surface is covered by water.
| A．why |
| B．how |
| C．because |
| D．whether |
________ felt funny watching myself on TV.
| A．One |
| B．This |
| C．It |
| D．That |
Not to be recognized, he dressed himself ________ rags on purpose.
| A．with |
| B．in |
| C．/ |
| D．For |
Believe in me! They ________ in the workshop last night.
| A．stay |
| B．are ataying |
| C．did stay |
| D．have stayed |
I’m suffering from a bad cold now. I’m feeling terrible, ________.
| A．though |
| B．anyway |
| C．indeed |
| D．however |