Is it always easier ____ friends than to keep them?
| A．making | B．make | C．to make | D．made |
I would appreciate ________ you could give me some advice on learning English.
| A．it whether | B．it if |
| C．that when | D．that if |
The local Tibetans and Sherpas laughed at the strange bottles containing ________ they referred to as “English air”．
| A．which | B．that |
| C．how | D．what |
The decision was made ________ more medical teams would be sent to help people in the earthquake.
| A．what | B．which |
| C．that | D．when |
Mobile phone users have developed a series of symbols, such as and to show ________ they feel.
| A．which | B．when |
| C．how | D．why |
Inside the White House, there is a room called the Oval Office. That's ________ President Obama works.
| A．why | B．where |
| C．what | D．how |