_____ 2000,this company has seen much new development. It has become one of the biggest companies in the country.
本题考查since的用法。根据现在完成时的时态可知,和2000搭配的介词是since “自……以来”,故答案为D。
Our school life _____ a lot since 2017. We have more activities now.
本题考查动词的时态。句意:从2017年以来我们的学校生活发生了很大变化。我们现在有更多活动了。根据since 2017 可知,要用现在完成时,故答案为D。
—_____ have you prepared for the competition?
—For two months.
根据答语“两个月”可知,问句问的是“你为这次比赛准备了多长时间?”,how long 意为“多长时间”,对时间段进行提问,故答案为B。