Every possible means to save the future of the baseball player so far.

Miss Sullivan clarified the science Project in Simple but vivid language so as to make it easier for teenagers ________.

What about your self­drive trip yesterday?—Tiring！The road is being widened，and we________a rough ride(2013·江苏，34)

There are some differences between American and British English, but do you know _____the differences came into being

Mary opened the door. There______ she had never seen before.