---- Would you have gone shopping had it been possible?
---Yes, but I ___ busy doing my homework.
| A．was | B．were | C．had been | D．would be |
After he retired from the office, Tom ______ painting for a while, but soon lost interest.
| A．took up | B．saved up | C．kept up | D．drew up |
When the old man ______ to walk back to his house, the sun ______ itself behind the mountain.
| A．started; had already hidden | B．was starting; hid |
| C．had started; had already hidden | D．had started; was hiding |
The majority of visitors ______ in favor of his conclusion that the number of books published on the subject ______ simply surprising.
| A．were; was | B．was; was | C．were; were | D．was; were |
— The plane is due to take off at 8:00 from the airport.
— ______ we can’t get there in time?
— Try to take another flight then.
| A．As if | B．Even if | C．Only if | D．What if |
— Now that you like the computer so much, why not buy one?
— Well, I can’t afford ______ computer at present.
| A．that expensive a | B．a such cheap | C．a so cheap | D．that an expensive |