There is no perfect person, some people have made _____success of themselves in spite of what would appear to be ______ weakness in their professions.
| A．/, a | B．a, / | C．a, a | D．/, / |
The old town has narrow streets and small houses _______ are built close to each other .
| A．in which | B．where | C．what | D．that |
We have made _______great progress in the medical field, but ______ progress we have made is not enough.
| A．a; a | B．a; the | C．/; the | D．/; / |
I have many foreign friends, some are businessmen.
| A．of them | B．from which | C．who of | D．of whom |
He used to ______ cards, but now he is used to _______ a walk after supper.
| A．play; taking | B．playing; take | C．play; take | D．playing; taking |
She is considered ___________ the work ahead of time.
| A．finishing | B．to finish | C．having finished | D．to have finished |