________do you go to the dentist——Let me see, twice a year, maybe.

How can I improve my spoken English— You have to practise ______ as muchas you can

When is he willing to lend his friends some money— Only when ______ hard enough.

Eric spends at least one hour _________ his grandpa every day.

Thedesksandseatscanbeusedforalongperiodoftime,they _____theheightofthechildren. [ ]