Barry must have visited the Eiffel Tower before，________he?

There was enough evidence to prove that the explosionin Robinson’s house _______ the leak of natural gas.

It has just __________ to me that there is still another possibility to ensure an immediate delivery of the goods.[ ]

he group discussion is nearing its end, makesure to ____it with important points.

Alice looks sad. Did you tell her about her brother’s accident?— Sorry, I ________ her just before her final exams.