Why do climbers on Mount Everest carry bottles of oxygen?

Read the following passage, then choose the correct answer to questions.

     I went to Australia on a student program last year and I like to (21)_______you about it. I was very (22)_______when I knew I was going to Australia because I had never been there before. I didn’t think about the problems of speaking English (23)_______I met my host family. At first I couldn’t communicate with them because my English was so bad. All the five years I had been learning English but I wasn’t much used at all (24)_______we didn’t have real practice at school. Even though my grammar was good, my pronunciation wasn’t. My problem is (25)_______ ‘l’ and ‘r’. For example, Australian people often asked “What do you eat in Vietnam?” I wanted (26)______ them that we eat rice, but they didn’t understand when I said “We eat lice”…

He was so brave that he could tell her what he thought about her.

Althought she seems intelligent, she’s not to be relied on.

Don’t touch the window. It _______.

Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions.

He suggested to go to Ha Long Bay since it's a famous natural wonder of Viet Nam.

We didn’t go to the theatre. We stayed at home.