单选题 Would you mind my ___ your car?

单选题 ___ the course very difficult, she decided to move to a lower level.

单选题 Have you finished ___ your report about environmental protection?

单选题 When you're learning to climb, ___ a good teacher makes a big difference.

单选题 More TV programs, according to the government official, will be produced ___ people's concern over food safety.

单选题 The washing machine needs ___ before it can be used.

单选题 I hurried to the supermarket, only ___ it was closed.

单选题 We have made a plan ___ Lei Feng.