It worried her a bit _____her hair was turning gray.
145. When people talk about the famous attractions in Changzhou, the first ______ comes into their mind is China Dinosaur Park.
146. What a pity it is that Bob ______ the habit of smoking at such an early age!
147. --- Where does Jack work? --- I’m not sure, but he worked at Motorola when I last met him, _____.
148. My father never _____ the idea that money brings happiness.
149. Do not start a book unless you can see from the first few pages that it is ______ you can easily read and understand.