This problem may lead to more serious onesif _______ unsolved.

Each boy and each girltalking about optional courses（选修课）.—Yes! And the eachtheir favorite one!

Ouch! You hurt me —I’m sorry But I _____ any harm I _____ todrive a rat out

appened so fast _______she had time to realize what washappening, she was struck on the head by a vase

____ the movie star has always been the focus of much media attention, he tries to lead a normal life