It sounds like a good plan, but there are some _____ difficulties in carrying it out.
| A．practiced | B．practical | C．practice | D．practicing |
In some places women are expected to earn money __________ men work at home and raise their children.
| A．but | B．while | C．because | D．though |
They kept trying __________ they must have known it was hopeless.
| A．if | B．because | C．when | D．where |
The bad weather meant __________ the rocket launch(发射）for 48 hours.
| A．delaying | B．having delayed |
| C．to delay | D．to have delayed |
Although the country has had political independence for over a century，__________ it needs the support of its neighbors.
naturally B. economically C. especially D. Luckily
— Is there any possibility __________ you could pick me up at the airport?
—No problem.
| A．when | B．that |
| C．whether | D．what |