Please put away your clothes hanging outside. As you know, dark clouds______ heavy rain.
| A．admit | B．promise | C．present | D．permit |
150. He was never late for school, _______ more than once by the class teacher..
| A．being warned | B．after warned | C．having been warned | D．for warned |
151. Oh, it is so cool in the house. You _______ have turned on the air-conditioner, haven’t you?
| A．should | B．might | C．must | D．Can |
152. The residents approve of the measure ______ so far in our city, _____ to bring a sharp rise in oil prices.
| A．having been taken; intended | B．to be taken; intending |
| C．taken; to intend | D．taken; intended |
153. Though our city has a good public transport system, _____ private car is becoming _____ popular means of transport.
| A．a; / | B．the; the | C．the; a | D．/; the |
154. Using renewable energy is a simple idea, but ______ we find it hard to put into practice.
| A．one | B．what | C．which | D．That |