______ should you give up learning English.
| A．In no time | B．Not only |
| C．No sooner | D．In no case |
Dr Yuan makes______ possible______ one-third more of the crop in the same fields.
| A．it; produce | B．it; producing | C．it; to produce | D．it; produced |
The fruit ________ fresh in his fruit stand sells well.
| A．looking | B．looked | C．looks | D．to be looked |
Where was it ______ you _______ our maths teacher?
| A．where; came to | B．that; come across |
| C．that; came across | D．where;come to |
----- 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.
| A．whichever | B．whenever | C．whatever | D．wherever |