_____ you have worked out the first problem, you may go on to work on the second.
| A．Even if | B．Unless | C．Now that | D．Though |
In the end I lost my ______ and shouted at her.
| A．character | B．manner | C．benefit | D．patience |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
—Excuse me, sir, ________
—I’d like a cup of coffee and two pieces of bread.
| A．what do you want? |
| B．may I have your order? |
| C．this table is reserved. |
| D．I would like to serve you. |
_______ is known to all, the 2008 Olympic Games were held in Beijing.
| A．It | B．As | C．That | D．What |
I have lost one of my gloves. I ______ it somewhere.
| A．must drop | B．must have dropped |
| C．must be dropping | D．must have been dropped |