The old woman ______ her sons and daughters ______ andsee her from time to time.

Famous physicists from all over the world came to theUS to ______the 100th anniversary of Albert Einstein’s birth.

Oxfam trailwalkers in Hong Kong have toclimb________ twenty hills and mountains. —It’s really a tough hike.

_______ weather it is, we shall set out on time.

_____ he or you to come home? [ ]