Trains with the first letter D or Z can run __________a speed of more than 200 kilometers an hour when it travels __________ thedesert

Their products enjoy 30 percent ________ ofthe market in this country because both the quality and their service are fine

______ careful you are, ______mistakes you will make.

The wet weather will continue tomorrow，when a cold front________to arrive

You can’t imagine ______ little ants can carry ______ heavy a thing.— That’s what we should learn from ants.