单选题 Hardly had I arrived at the office ________  the meeting began.

单选题 Don’t be afraid of             mistakes when you learn to speak English.

单选题 She says China has been in her blood _______   she lived there as a young girl.

单选题 The countries in _________English is spoken can be grouped into different categories.

单选题 People will be more open to communicating with you________  you show respect for them and their ideas.

单选题 This letter is to inform you that I need to      _______ _sick leave starting today.

单选题 One challenge for driverless cars is how they deal  _________ anything unexpected.

单选题 You might be ready for a change, but that doesn’t mean you should start  ________ a job right away.