When I first arrived ________San Francisco,I had a difficult time ________certain aspects of the American way of doing things.
| A．at;to understand | B．in;to understand |
| C．in;understanding | D．at;understanding |
— Who are you going to have _______ this letter for you?
— My secretary.
| A．type | B．typed | C．been typed | D．been typing |
Not others but Mother always _____ children ______ in their beautiful clothes.
| A．keep; dressed | B．kept; dressing | C．keeps; dressing | D．keeps; dressed |
The West Lake we visited last year was really_____ attraction and we'd like to visit it _______ second time next year.
| A．\; a | B．the; the | C．an; a | D．\; the |
He ________ in American for five years, and now he works in Shanghai.
| A．have worked | B．worked | C．had worked | D．have been working |
Mary was born in 1752 in a rich family in _____ is now the state of Virginia.
| A．which | B．where | C．that | D．what |