1.【2019 ?广西百色市】My brother joined the army_____September last year.

　　A. on B. by C. at D. in

　　2.【2019 ?凉山州】—Look, there is a cute bird, Mom.

　　—It flew into our kitchen the window just now, Alex.

　　A. across B. through C. above D. under

　　3.【2019 ?湖南长沙】Yesterday our headmaster made a speech ______ environmental protection, and we learned something about recycling of waste.

　　A. on B. at C. to

　　4.【2019 ?湖北省咸宁市】—Thanks to our government, we can have a new library next week.

　　— That’s great! And we will read books there____ a month.

　　A. before B. in C. by D. until

　　5.【2019 ?襄阳市】— How strange! You sit in your room for a long time, Li Ming.

　　— I just want to be quiet for a while. I’m sorry, Dad. I failed the test again.

　　A. in silence B. in person C. in public D. in fact

　　6.【2019 ?江苏省南京市】Xinhua Zidian, or the New Chinese Dictionary, was first published ______1953.

　　A.on B.in C.at D.for

　　7.【2019 ?四川省广元市】—What time do you usually get up?

　　—________ 7:00.

　　A. At B. In C. On

　　8.【2019 ?贵阳市】The People's Republic of China was founded October 1st，1949. We'll celebrate its 70th anniversary this year.

　　A. in B. on C. at

　　9.【2019 ?广西河池市】My English teacher always comes into the classroom _______ a smile.

　　A. by B. for C. on D. with

　　10.【2019 ?河南省】—Shall I help you go the street, Grandpa?

　　—No, thanks. I can manage it myself.

　　A. on B. with C. across D. along

　　11.【2019 ?吉林省】—Excuse me. Where is the nearest bookstore?

　　—Go Center Street and you' ll find it.

　　A. For B. along C. with

　　12.【2019 ?南通市】It’s been 100 years since the May Fourth Movement took place May 4, 1919.

　　A. for B. in C. at D. on

　　13.【2019 ?四川省内江市】— When did Neil Armstrong walk on the moon?

　　—________July 20th, 1969.

　　A. In B. At C. For D. On

　　14.【2019 ?天水市】Most of the villagers took part in the Dragon Boat races 9:00 a. m. the morning of June 7.

　　A. at; in B. on; on C. on; in D. at; on

　　15.【2019 ?江苏省无锡市】Let’s take a walk ___________ the river after diner, shall we?

　　A. along B. through C. upon D. over