Scientists are trying their best to_______ ways to treat the terrible disease caused by Ebola(埃博拉).
—Who is the girl in red in the photo? —She is my Lily.She is my uncle’s daughter. A.sister B. aunt C. cousin
—What are those? —are books.
His parents __________ everything good that he does. A. take pride in B. be proud of C. deal with
People should not cross the street ______ the traffic lights turned green. A. when B. until C. after
---Did he ______ wear glasses? --- No, he _________. A. used to; isn’t B. use to; didn’t C. use to, wasn’t