—Please sit down and have a break. You have been working on this machine

nonstop for two hours.

—No, thanks.               .

A．I’m not in the least tired                B．I’m too tired to move

C．I’m not a little tired                       D．I’m a bit tired

 While income worry is _______ rather common problem of the aged, loneliness is another problem that ________ aged parents may face.

A. a; 不填          B. the; 不填      C. a; the          D. the; the

 It is important to know about the cultural differences that        cause problems.

A．must              B．dare                C．need            D．may

 The project _________ by the end of 2011, will expand the city’s telephone network to cover 2000000 users.

A．being accomplished             B．accomplished

C．to be accomplished                 D．having been accomplished

 Barack Obama has taken personal blame ________ the security failures which led ________ the attempt to blow up a plane on Christmas Day.

A. of; to                    B. for; to                         C. on; on                          D. in; on

 ―Look! What a mistake! Why?

―Sorry, I _________ on it.

A. don’t concentrate                     B. hadn’t concentrated

C. haven’t been concentrating                      D. wasn’t concentrating

 When realizing the guard of the supermarket had spotted him , the thief        the exit as quickly as possible.

A．made for                                        B．made out

C．made up                                        D．made into

 __________, the dancers practice hard to make their dreams come true.

A. Being disabled as they               B. As they are disabled

C. Disabled as they are                 D. Disabled so they are

 When my grandpa was young, he had to       several miles a day to school since he had no money to take a bus.

A. cover          B. take                C. get                 D. make

 From facts, scientists have ___________ that more energy is being absorbed from the sun, throwing the earth’s energy “out of balance”.

A. confirmed     B. concluded         C. concentrated        D. centred