If you _____________ your study, I am sure you will make greater progress.
| A．concentrate on | B．concentrate to |
| C．focus to | D．focus at |
Mr. Green stood up in defense of the 16-year-old boy, saying that he was not the one .
| A．blamed | B．blaming | C．to blame | D．to be blamed |
I on my report next week so I won’t be able to meet you any day.
| A．am working | B．will be working |
| C．was working | D．have been working |
They haven’t made known where they are to hold the conference.
| A．this | B．that | C．it | D．one |
— Jenny took the 8:00 bus to Guangzhou this morning.
— Really? He the 9:00 train. It's much more comfortable and safer to travel by train.
| A．could have taken | B．should take | C．must have taken | D．can take |
If you want to be a successful leader, you need to your confidence first.
| A．add up | B．get up | C．build up | D．make up |