Betty arrived _____London _____ the evening of June 1st. A. at, in B. at, on C. in ,in D. in ,on

麻烦讲解一下这几道选择题考的什么语法，选哪个，并说明一下理由，谢谢。
Betty arrived _____London _____ the evening of June 1st.
A. at, in B. at, on C. in ,in D. in ,on
——Do you ofen see William _____on the playground?
-----No,but he is often seen_____Chinese Kongfu in the park.
A.run,play B. run,to play C. running, play D. running, to play
If so, you probably need help ___the bigger choices in your life, like what to do when you are older.
A. make B. to make C. made D. making
They told about lots of defferences between children's lives in cities and _______in villages.
A. ones B that C. those D. them

D
D
B
C

B,D,B,B

Betty arrived _____London _____ the evening of June 1st. A. at, in B. at, on C. in ,in D. in ,on C. LONDON地方比较大,用IN.如果是AIRPORT,HOME之类的小地方,用AT. in the morning/afternoo/evening和at night,是固定语法. ——Do you ofen see William _____on the playground

(1) D (2) D (3) B (4) C