Choose a subordinating conjunction to combine each pair of simple sentences. 选择合适的连词连接每一题中的两个句子。 Sleep patterns change during teenage. Any parent of a teenager can prove.

Choose a subordinating conjunction to combine each pair of simple sentences. 选择合适的连词连接每一题中的两个句子。 Some people have the mistaken belief. Depression comes from weakness or is a character flaw.

Choose a subordinating conjunction to combine each pair of simple sentences. 选择合适的连词连接每一题中的两个句子。 Computers work accurately and at high speeds. They save research workers years of hard work.

Choose a subordinating conjunction to combine each pair of simple sentences. 选择合适的连词连接每一题中的两个句子。 A child’s daydreaming is hindering him/her from progressing in school or from gaining social        skills. There is no need to discourage it.

Choose a coordinating conjunction to combine each pair of simple sentences. 选择合适的并列连词连接每一题中的两句。 Important cultural documents, not all pictures can be saved. Not all pictures should be saved.