________ is known to everybody, Taiwan is a part of China. We must unify it.
| A．It | B．As | C．Which | D．What |
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 |
155. In Beijing volunteers are making use of every minute to ______ their foreign languages because volunteers must pass a written test and an interview.
| A．polish up | B．take up | C．put up | D．make up |
156. As is known to all, hard work will _____ in time.
| A．pay out | B．pay back | C．pay up | D．pay off |