One of the great things about science is that it has taught us to be __________ about surface appearances. The world seems flat, but it is, in fact, round.
149. Do not start a book unless you can see from the first few pages that it is ______ you can easily read and understand.
150. He was never late for school, _______ more than once by the class teacher..
151. Oh, it is so cool in the house. You _______ have turned on the air-conditioner, haven’t you?
152. The residents approve of the measure ______ so far in our city, _____ to bring a sharp rise in oil prices.
153. Though our city has a good public transport system, _____ private car is becoming _____ popular means of transport.