In this speech the scientist _________ thegold medal to his first teacher.

All the isatis root（板蓝根）is sold out!—People are crazy! expertssay there is no use eating isatis root to preventH7N9, some people still don’t believe it.

o birds _________ each other in shapeand color In other words, they ________ each other in shape and color

It was not until she got home _______Jennifer had realized she had lost her keys.

She is _________ at the _________ news.