Помогите пожалуйста с английским… 1. Since then the monster … at least once a year. a) saw; b) has been seen; c) has…

1. Since then the monster … at least once a year.b) has been seen; 2. The doctor asked how long … the medicine.b) I had been taking; 3. I can give you this book. You … go to the library.b) needn't4. The news made Jon … .a) laugh