Choose the correct option to fill in the blank of the following sentence: The Sahara is the ……………. desert in the world.

Choose the correct answer A, B, C or D to answer the following question: You must_____ your room now.

Choose the correct answer A, B, C or D to answer the following question: What are the superlative forms of the following adjectives? high, cheap, bad, good

Choose the correct answer A, B, C or D to answer the following question: I'm afraid you ________ enter this area. It is dangerous.

Choose the correct answer A, B, C or D to answer the following question: Nam is ______ in his class.

Choose the correct answer A, B, C or D to complete the following sentence: _______ is a place where water flowingfrom a river rushes down from a higher to a lower point.