单选题 In the survey, we asked the workers about things ______ made their work harder to do.

单选题 ______ your trip is short or long, we can work out a schedule for you.

单选题 We should be ______ of cultural differences while doing foreign trade.

单选题 It was not until 2016 ______ the company opened a branch office in this city.

单选题 ______ cars were invented, mankind has dreamed of self - driving cars or riderless cars.

单选题 If you need further guidance, feel free to ______ an appointment with our advisor.

单选题 The company can now focus its attention ______ developing its latest car model.

单选题 Most of them said they felt anxious when ______ a new job.