The volunteers wanted to set up a library for the village. They ______________a lot of difficulties and finally realized their dream.
A.got into B.got away C.got over
—In fact, WeChat has become a necessary part of our daily life since it______________.
—I can't agree with you more.
A.is invented B.was invented C.has invented
Listen! Tom ______________in the classroom. How beautiful his voice is!
A.has sung B.will sing C.is singing
—The accident taught me a ______________that I will never forget.
—I think we should always put safety in the first place.
A.lesson B.method C.skill
Linda is interested in ancient buildings, ______________when she saw the Fujian earth building（福建土楼）, she jumped with excitement.
A.or B.but C.so
When Mr. Li came in and saw the clean and tidy classroom, he was very satisfied and praised the students who were______________.
A.on time B.on business C.on duty
