Leek 
To dream of a leek signifies triumph and protection.
Lice
To dream of lice suggests guilt, anxiety, and depression. Perhaps you feel that you are a physical and emotional wreck. Also, lice represents that you need to stay away from certain selfish people and relationships.
Test
You dream of the big test and something terrible happens - you've forgotten your calculator, you can't find a pencil, or your mind is blank. It happens to everyone at some point in their lives. Dreams of tests and exams are very common because our lives are full of tests in many forms. When we are young and still in school, tests are still the greatest measure of your success.
Dreams of a test which occur leading up to an actual test in school refer to our anxieties about performance. You study and study but until the test is actually over, you won't know if it was a success or your studies had paid off. This kind of absolutist thought leads to great insecurity. It would be better to relax and reflect upon previous success and remember that a single test is not the same as an accumulation of success over a lifetime. Everyone makes mistakes at some point of time.
When there is not a true test coming up in your waking life but you are having test anxiety dreams, this may occur because you are associating stress in your daily life with the same feeling of stress that you had as a child in school. It is likely that you are feeling judged at work or at home. Perhaps this judgement is actually coming from within yourself.
Many test dreams focus on time. You might arrive too late to the exam, or suddenly run out of time, or are caught staring at the clock and time just flies by. This symbolizes our fear of time, and particularly an anxiety that we can never have enough time to prepare completely for life. Life is a process, and there are thousands of hours that could be put into studying various subjects or activities. We can never become experts in everything and we all have an inner fear that we will not accomplish everything we would like before we die. It is important to remember that we are all in the same boat, and that other people actually understand this as well.
Sometimes we have the highest ambitions for ourselves, and much higher expectations for ourselves than others. Most people who have test dreams are actually driven by a strong desire to succeed, and it is unlikely that you will not meet that success.
Ferns
To dream about ferns represents the ambitions, concerns, or fears you may have regarding the years ahead.
Ferry
To dream that you are riding a ferry suggests that you are enduring changes within your life. You are channeling new ambitions and setting new goals.
To dream that you are waiting for a ferry indicates that things you may not have planned or expected could get in the way of your hopes and dreams.
Gauze
To dream that you are dressed in gauze indicates that there is a lack of certainty regarding wealth in your future.
Laser
To dream of seeing a laser embodies precision and truth. You are appreciating and understanding things in an objective manner. Alternatively, it suggests that you need to redirect your attention and focus on a single task at a time.
North
To dream of the direction north symbolizes realities in your life. It also suggests that you are moving forward and making progress in life.
Opera
To dream of an opera suggests a desire for greater things in life, even to the point of occasional grandstanding.