The scientists ________ on the new medicine for two years. They will succeed in no time.
A. work B. are working C. have worked D. will work
That rude man seldom uses kind words, ________?
A. does he B. isn’t he C. was he D. hasn’t he
The policeman caught the drunk driver, but he didn’t remember ________ the old lady.
A. knock down B. to knock down C. knocked down D. knocking down
After the conversation with the teacher, Jenny’s mother looked a little ________.
A. happiness B. happier C. happy D. happily
We just hope that Tom will bring ________ good news back home this time.
A. a few B. some C. many D. little
Every year the world’s top tennis players _______ to Shanghai to compete against each other.
A. come B. will come C. have come D. came
