21、He goes to work early on workdays          Saturday and Sunday．

A．except                 B．besides                C．and                  D．and

20、---My friends always get better grades than I do．What should I do?

---       

A．Maybe you should be more friendly to the teachers．

B．Maybe you should ask your parents for help．

C．Maybe you should work harder．

D．Maybe you should play sports．

19、---“What time does the plane         ?”

---“I think at about 10 o'clock．”

A．drop off               B．get off                 C．take off                  D．look for

18、Lily called me          Friday morning and told me she was having a birthday party          me tomorrow．

A．at；for                B．on；with             C on；for              D．in；at

17、Nina is clever but kind of lazy．If she          harder, she          better grades．

A．will work；gets                                B．works；will get

C．will work；will get                              D．will work；getting

16、If you meet troubles in your life，you must try to          the troubles．

A．turn over             B．get over               C．look over                      D．look at

15、I was never          to receive a          result from my science teacher．

A．surprised；disappointed                           B．surprised；disappointing

C．surprising；disappointed                             D．surprising；disappointing

14、Would you like          the window，please? It's so cold．

A．to close               B．close                   C．closing                   D．closes

13、Would you mind          the bike for me?

A．mending              B．mend             C．mends                  D．to mend

12、In China，many families are          to buy cars these days．

A．enough rich           B．rich enough            C．very rich             D．richer