—I can’t find my e-dictionary. —I saw Mary going with ________. However, I am not certain if it is yours.

 All of us found ______ difficult to work out the maths problem.

They have been working on the bridge for a week. It seems they need ________ two weeks to finish it.

________ arouses his interest can be found in the school library and that is why he goes there ________ happens.

 Does ________ matter much if they do not come tomorrow?