He managed to reach the summit of his career, but it was at the ______ of his health.
| A．consumption | B．credit |
| C．exhaustion | D．expense |
In the 19th century the government _____ land to settlers willing to take care of it.
| A．advocated | B．separated | C．divided | D．distributed |
It ______ quite correct that happiness comes from thinking about things in a positive way.
| A．has turned out | B．has been turned out | C．is turning out | D．is turned out |
— Did you know any Chinese, Joyce, before you arrived in Beijing?
— In fact, never _______ it.
| A．have I learned | B．I have learned | C．had I learned | D．I had learned |
— Ten dollars, please!
— How terrible! I ______ bringing my wallet with me.
| A．was forgetting | B．forgot | C．had forgotten | D．am forgetting |
Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.
| A．which | B．what | C．that | D．when |