Question

【題目】Betty ___________ hard since last term. That’s why her exam results are so good!

A. has worked B. will work C. worked D. was working

Answer 1

【答案】A

【解析】句意：自上學(xué)期以來貝蒂一直努力學(xué)習(xí)。那就是她考試成績?nèi)绱撕玫脑�因！考查�?dòng)詞時(shí)態(tài)。since last term自從上學(xué)期以來，表示的是一段時(shí)間；work工作，動(dòng)詞，是持續(xù)性的。根據(jù)句意，結(jié)合句子結(jié)構(gòu)，可知本句是現(xiàn)在完成時(shí)態(tài)，Betty是三單人稱，需用has構(gòu)成完成時(shí)，故選A。