The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they ________.
| A．were playing | B．were to play | C．had played | D．played |
He is sweating heavily. He _______ weightlifting for a long time.
| A．could have practiced | B．can practice | C．must have practiced | D．might practice |
What he said just now had little to do with the question _____ discussion.
A onB in C under D at
The course about Chinese food attracts over 100 students per year, ________ up to half are from overseas.
| A．in which | B．for whom | C．with which | D．of whom |
The tour pal lost his way in the mountain; ________ made things worse was that it began to rain.
| A．that | B．what | C．which | D．who |
— How do you think of my composition?
— Almost perfect ________ one spelling mistake.
| A．but | B．except | C．except for | D．besides |