Use the correct form of verbs in brackets.

1.     In all the world, there (be) _______ only 14 mountains that (reach) _______above 8,000 meters.

2.     He sometimes (come) _______to see his parents.

3.     My grandfather never (fly) _______in an airplane, and he has no intention of ever doing so.

4.     We just (decide) _______that we (undertake) _______the job.