How about your travel?-You can hardly imagine what difficulty we have had_____________the vast desert.[ ]

I would rather historythan geography because I can learn a lot from many historical figures

Hello, this is Jack. May I speak to Tom– Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.

With the National Day _____, the whole city takes on a festival atmosphere. [ ]

His lecture was so long and ________ that many people felt ________ and left before it ended.[ ]