用所给词的适当形式填空
【小题1】Ann is going for a picnic with her friends instead of _________（go）shopping with her mother.
【小题2】Jack spoke a few words of _________（introduce）before the dinner party began.
【小题3】I think our factory needs further _________（develop）.
【小题4】Now the old adding machine _________（replace）by a computer.
【小题5】It seems _________（be）the best solution.