1 . ___________in 1931, the Empire State Building, the highest skyscraper until 1954, inspired the imagination of the world.

A．Having completed	B．Being completed
C．Completed	D．Completing

2 . Technological innovations, ____ good marketing, will promote the sales of these products.

A．combined with

B．combining with

C．having combined with

D．to be combined with

4 . ____________by the police, the kidnappers had no choice but ________up.

A．Surrounding; to give	B．Having surrounded; to give
C．Surrounded; to give	D．Surrounded; give

5 . To return to the problem of water pollution, I’d like you to look at a study ________ in 2012.

A．conducted

B．conducting

C．being conducted

D．was conducted

6 . A large number of paintings are collected and displayed in the British Museum, the most famous one ________(estimate) to be worth more than 80 million dollars. （所给词的适当形式填空）

7 . Her father stood by the window, his eyes ______ on the heavily-wooded hills in the distance.

A．fixing

B．having fixed

C．to be fixed

D．fixed

9 . ______in painting, John didn’t notice evening approaching.

A．To absorb	B．To be absorbed
C．Absorbed	D．Absorbing