He is a very honest official and never _____ any gifts from the people who sought his help.
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
— When could you have a meal with me? — I'd like to go _______ it is convenient to you.