People laugh at jokes, but seldom ________ about how they work.
| A．they think | B．think they | C．they do think | D．do they think |
The tsunami which happened in the Indian Ocean in 2004 ______ thousands of people homeless.
| A．caused | B．let | C．remained | D．left |
Julia，if you hurry up，I think it quite ______ that you will catch the next train.
| A．probably | B．certainly | C．likely | D．possibly |
People have always been curious ______ how living things on the earth exactly began.
| A．in | B．at | C．of | D．about |
_____ money，it remains to be seen whether we can put the idea into practice.
| A．Lacking | B．Lacked | C．To lack | D．Having lacked |
When I took his temperature，it was two degrees above ______.
| A．average | B．ordinary | C．regular | D．normal |