选择题

　　一、单项选择

　　1.May Day holiday is _______ time for leisure.But making good use of ______ time is not an easy task for most people.

　　A.the; the    B.不填; a    C.the; a    D.a; the

　　2.When _______ comes to the super star, all the students in class will pick themselves up at once.

　　A.that    B.this    C.it    D.one

　　3.He was excitedly surfing on line ________his friends called him to play football.

　　A.as    B.while    C.when    D.then

　　4.— Can you tell me why all the jackets and shoes are sold at half price here?

　　  — As far as I know, this store _______.

　　A.has closed down    B.is closing down

　　C.closed down           D.had closed down