At that time, the calculator was a great ______ / ɪn'venʃn/.
The price of the shoes ________than before. A. is more expensiveB. is much higher C. is much lower
Because Robert was seen ____ the room, everyone thought he was the thief. A. to enter B. enter C. entered
______ has Miss Green taught in your school? For about six years.A. How long B. How soon C. How far
I hear there will be all kinds of robots________ twenty _____ time .A. after, years B. in, years’ C. for, year’s
I know Beijing very well since I ________ there three times.A. have been B. went C. have gone