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To complete the project as planned, the workers were busy working all day, only ______ a short rest once in a while.

The money he has contributed in the past years to ______ the disabled is now considered to be of great value.

.______ to computer games, he had no time to go over his lessons. As a result, he failed in all subjects.

The music, ____________ pleasant, was soon well received when it was taken to the stage.

----Did the reference give the information you needed?
----Yes, but            it, I had to read it entirely.

_____ according to the instructions, the robot can behave like a human being with average IQ.

I wondered what difficulty he had _____ the plan.

The exhibition is well worth _____ and you can see fancy vases of different dynasties on show there.

The kind lady devoted all her life to _____ those homeless children.

Don't spend time beating on a wall, ________ to change it into a door.