It’s not safe for you to go to the forest alone, for you ________ lose your way in it.
A. need B. must C. should D. may
JD.com is one of ________ shopping websites in China.
A. large B. larger C. largest D. the largest
When the father heard from his son from abroad, he became ________.
A. exciting B. happily C. happiness D. excited
We were all ________ favor of this plan after we discussed for about two hours.
A. at B. in C. to D. on
Frank looks very worried today. There must be ________ wrong with him.
A. anything B. nothingC. something D. everything
As students, we should work hard and do ________ best to realize our dreams.
A. us B. our 
C. ours D. ourselves
