The last time we had great fun was _____ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
Jackson________to work in government office though he hated serving there.
| A．wanted |
| B．was wanted |
| C．was wanting |
| D．had wanted |
Albert Einstein will always be remembered________a great physicist________his Theory of Relativity.
| A．for; for |
| B．as; of |
| C．as; for |
| D．as; with |
—The window is dirty.
—I know. It________for weeks.
| A．hasn't cleaned |
| B．didn't clean |
| C．wasn't cleaned |
| D．hasn't been cleaned |
—Why isn't the recorder ready yet?
—I'm sorry. It________in the shop.
| A．is being repaired |
| B．is repaired |
| C．has been repaired |
| D．hasn't repaired |
As a result of the use of the new technology, the production of this product________50 percent.
| A．has risen to |
| B．has been raised to |
| C．has risen by |
| D．has been risen by |