Question

SUPPLY THE SIMPLE PAST OR THE PRESENT PERFECT TENSE OF THE VERBS IN PARENRHESES

1. our modern system of communication ................................(save) us a lot time last year.
2. the energy crisis ...........................................(cause) changes in our everyday life.
3. george......................................(travel) with pat for at least three months.
4. ..........................you....................(begin) your reseach yet?
5 ...............................she.....................(send) you her project yesterday

Answer 1

1. Saved, 2. Has Caused, 3. Has travelled. 4. Have you begun, 5. Did she Send?