30．At weekends we help mother with housework in the kitchen         she can enjoy      herself by searching the Internet.

       A．after                   B．until                   C．that                     D．so that

29．This is a big class, and         of the students are boys.

       A．two third             B．second three        C．two thirds            D．two three

28．? Are you going to buy a camera?

   ? Yes. But there are so many kinds that I can’t decide          to buy.

       A．which                 B．what                   C．how                    D．where

27．I feel it hard to keep up with my classmates. But whenever I want to        , my teacher always encourages me to work hard.  

       A．go on                  B．give up               C．run away             D．give back

26．? Did you have any problems in London?

   ? Yes,          Chinese food like rice, noodles and dumplings.

       A．find                    B．found                  C．finding                D．to find

25．? Mum, could you buy me a dress like this?

   ? Certainly. We can buy         one than this, but          this.

       A．a better; better than                              B．a worse; as good as

       C．a cheaper; as good as                            D．more beautiful; so good as

24．? Mary! You are so special that you seem different from other girls.

   ? Everyone in the world is different. So, just        ! It’s the best way of life.

       A．be yourself                                         B．enjoy yourself               

       C．help yourself                                       D．take care of yourself

23．? Look! What a good garden!

   ? Yes. It          every day.

       A．has cleaned                                         B．is cleaned               

       C．cleans                                                 D．is being cleaned

22．? I can’t stop smoking.

   ? For your health, I’m afraid you          .

       A．can                     B．may                    C．have to                D．must

21．You should be out playing           working indoors all day.

       A．instead                B．instead of            C．rather                  D．and