As is known to all language learners, the newly learnt words will soon be forgotten unless they are _______ used in everyday communication.

---Have you been to the National Theatre? ---No, but I’ve         bought two tickets for the concert to be given this weekend.

I was caught in the traffic jam this morning; ______, I would have come on time.

I caught the last bus from town, but Harry came home___________ that night.

There is no ______ swimming-pool in this school and the students often go to swim ______.