I really don’t know ______ I had my wallet stolen.
| A．when was it that | B．that it was when |
| C．where it was that | D．it was where that |
The boy’s father was the first man the good news.
| A．heard | B．to hear | C．hears | D．hearing |
When Ben’s house was on fire last night, several neighbors rushed to his and put out the fire.
| A．expectation | B．absence | C．assistance | D．requirement |
Jane from the company and moved to China in the hope of new opportunities.
| A．returned | B．resigned | C．escaped | D．learned |
This is the first study to compare the effects of the new drug with its side effects.
| A．beneficial | B．specific | C．powerful | D．potential |
All animals in nature must learn to to a changing environment in order to survive.
| A．attach | B．adapt | C．respond | D．turn |