从右栏选项中找出左栏各句的恰当应答。

                I                                                                                                   II

46. 1.Hello,Jenny speaking. ____                                             A.I like music that I can dance to.
47. 2.How often does Jeff go to the library? ____                   B. It's 876-9548.
    
48. 3.What's your telephone number?    ____                         C. They're pretty good.
    
49. 4.What do you think of the cartoons? ____                       D. Hi, Jenny. It's Steve.
    
50. 5.What kind of music do you like?  ____                            E. Hi, I'm Jack.
    

                                                                                                   F. Once a week.

看音节写字组词语。

biān    ____  ____     ____  ____      ____  ____

cè    ____  ____     ____  ____      ____  ____

gāng    ____  ____     ____  ____      ____  ____

下列提高热机的效率的方法中，不可行的是    （   ）