（用所给动词的正确形式填空）Lucy __________ (spend) over a month in learning how to swim．Now she can

swim well.

（用所给动词的正确形式填空）Each colour on the world map ________ (represent) a different country．

（用所给动词的正确形式填空） He missed the opening ceremony(开幕式) and he ______ (explain) to us why he was late．

（用所给词的正确形式填空） Students should be ________ (act) in class．In this way，they can learn a lot

（用所给词的正确形式填空） I like Denny very much because he is a ________ (practice) student．

（用所给词的正确形式填空） You can't make Jim give up ________ (easy)，because he is stubborn．

（用所给词的正确形式填空） Tina is good at ________ (cook)，she wants to keep healthy．

（用所给词的正确形式填空） When Edison was young，he was _________．(imagine)

（用所给词的正确形式填空） David always pays _______ (attend) to details．So he makes fewest mistakes in his class

（用所给词的正确形式填空） Yao Ming is one of the most ________(success) basketball players in China．