The job is great ________salary. It has its disadvantages,though.
Sweet memories ______ as I looked at the pictures _____were taken at the beach last summer.
Dr Yuan makes______ possible______ one-third more of the crop in the same fields.
The fruit ________ fresh in his fruit stand sells well.
Where was it ______ you _______ our maths teacher?
----- Mary looks very upset. She _______ failed to pass the exam. ----- I guess so. It's very difficult after all. A must have B could have C should have D might have