We are bound ______ with difficulties in carrying outthis research.

下列各句中没有语病的一句是（ ）

It is a tough task, but we are _________ not to shrink(退缩) from it.

Neither side was willing to give in at all. As a result, no agreement __________.[ ]

graduated from high school , my family had a business____ I never thought about getting a college education