Mary has______ speaking dialects, so it is not surprising to see her communicate with the people from different parts of this country easily.
His younger sister may already be in high school now, in ________ case this picture book is too childish for her.
It is by no means clear ________ the president can do something to end the strike.
Good shoes, clothes and a backpack are the basic ________ you need for your hiking.
The Australian boy has a good ________ of Chinese and can express himself freely in it.
—How can I use the equipment?—Well, just refer to the ________.