．—______ I lock the lab before I go home—Don’t bother．I’llcheck it myself later．

I ____ a tour guide for 7 months.

Besides French, my uncle speaks English, but I can only speak a few broken sentences of English.[ ]

The police set about arresting the suspect______ they found enough evidence to prove him guilty

ing that _______ is not whether you fail or not,but whether you try or not