Because of the measures the United States has put , along with the world-class health system, the chances of an Ebola outbreak in the country is extremely low.

I hear Li Yuan wants to be a cosmonette(女宇航员) like Liu Yang. It’s difficult for her.—But I think she can ______ her goal after work hard.

I used to quarrel a lot with my parents, but now we _____ fine. [ ]

My old car I had had ____________yesterday.

He is too old to run_____ to catch up withthe young boy.