Underline the correct option. 1. Old clothes should be thrown/should throw away. 2. Information must store/must be stored on a flash drive. 3. You should send/should be sent the email as soon as possible. 4. You must be used/must use only a pen in this exam. 5. The flight may cancel/may be cancelled because of the bad weather. 6. Changes should make/should be made to the document.