_______ the moon moves round the earth is well known to all of us.

The twins are so alike that its almost___ (possible)to tell them apart.

Whenwereturnedfromourvacation,ournextdoorneighborswere______anewgaragebuilt.

FindingHarrietshouse______tobemoredifficultthanNickhadexpected.

Whentheshiplostitsenginepower,thecrewfoundthemselvesatthe_________ofthewind.