It was playing computer games _____ cost the boy plenty of time _______ he ought to have spent doing his lessons.
Come ______, everybody! Look at this _______, and you will find something terrific.
Eugene’s never willing to alter any of his opinions, so it’s no use ________ with him.
Up till now we _______ four units and this will be the second time that we _______ a test.
Charlie ______ be really difficult at times even though he’s a nice person in general.
It was only after I came across that matter_______ how important it was to master a foreign language.