1 . ______himself to his research on the IT technology, he soon made a breakthrough.

A．Devoted

B．Devoting

C．Devote

D．To devote

2 . Though ____ money, the parents of the twins managed to send them to university.

A．lacked

B．lacking

C．lacking of

D．lacked in

3 . "We can't go out in this weather, "said Bob, _____ out of the window.

A．looking	B．to look
C．looked	D．having looked

4 . At the age of 29, Dave was a worker, ________ in a small apartment near Boston and __________what to do about his future.

A．living; wondering	B．lived; wondering
C．lived; wondered	D．living; wondered

5 . Limited natural resources should be made full use of ________ the ________ need of energy.

A．to meet；increasing	B．to meet；increased
C．meeting；increasing	D．meeting；increased

6 . ____ several times, the young scientist still kept on doing his experiments.

A．Having failed

B．Having been failed

C．Failed

D．To fail

7 . ________ very confused，the little girl looked up the information in the book to find out the answer．

A．Being felt

B．Felt

C．Feeling

D．To feel