I.  Chọn một từ thích hợp điền vào mỗi chỗ trống để hoàn thành đoạn văn sau.
millions             examining               recognize                 like                   solar
                Are there intelligent beings on the other planet in our (26) ______ system? Maybe there are. In our own galaxy there are (27) ______ of stars. Some must have planets with conditions (28) ______ those on earth. Somewhere in space there could  be other thinking beings. They would probably look so different  that we might not (29) ______ them as people. However, if their planet is older than our planet, they may know more than us. They may have more progress in some aspects. They may be traveling in space and be (30) ______ human beings.       
II 
at                 expensive              weather                   see                  resorts
One of my favorite vacation places is Mexico. I really like the (26) ______ there because it never gets cold. The people are very nice, too. They never laugh (27) ______ my bad Spanish. The food is really good. Mexico City is a very interesting place to visit. It has some great museums and lots of fascinating old buildings. The hotels are too (28) ______ to stay but there are more affordable options. For example, you can stay at one of the beach (29) ______ like Acapulco. If you are planning to visit Mexico, you should (30) ______ the Mayan temples near Merida. 
III. 
can                   important                   on                       like                  than                    has
            Many tourists (26) _______ to send postcards to their friends and family. They send them when they are (27) _______  holiday. These postcards often have pictures on one side and a message (28) _______ be written on the other. The pictures on them are better (29) _______ the photos they take. The first postcards were sent at the end of the nineteenth century. There was a picture of a town on them. Later on, they had pictures showing (30) _______ events. People liked to see them because there were not any pictures in the newspapers then.
IX. 
      activities            upload             variety             posts            search            others  
    A common way for people to socialize these days is to spend time in chat forums. These usually have several different chat rooms related to a (26) _______ of interests and hobbies where you can talk to like-minded people. Other popular online (27) _______ include microblogging, in which people make very short comments about things, as well as file-sharing sites, where people (28) _______ music, videos or photos to share with (29) _______. Whatever your interests, you can find sites related to just about any leisure activity simply by entering key words into a (30) _______ engine.