Recent research has the cause of the disease.
| A．thrown off | B．thrown open | C．thrown out | D．thrown light on |
Though she did not know Boston well, she made her way_____to the Home Circle Building.
| A．easy enough | B．enough easy | C．easily enough | D．enough easily |
---I went to see my friends off at the airport.
---Is that_____you were late for the important meeting?
| A．because | B．why | C．how | D．reason |
Mary is crazy _______ playing the piano.
| A．at | B．in | C．about | D．of |
It is______ these stories can amuse her.
| A．sure | B．surely | C．certain | D．eager |
would you please_____this form for me to see if I’ve filled it right?
| A．take off | B．look after | C．give up | D．go over |