_____improve her English, Jenny bought a lot of tapes for herself

Professor Smith, together with his assistants, ________on the project day and night to meet the deadline.[ ]

But for the help of my English teacher, I ________ the first prize in the English Writing Competition.

The old town has narrow streets and small houses _____are built close to each other.

It was several years ________ I realized ________ David had lied to me.