You can never be ________ when crossing the street．
| A．very careful | B．too careful |
| C．carefully enough | D．enough careful |
It’s nearly 5 years since I worked in the company. I _______ in a school.
| A．taught | B．was teaching |
| C．am teaching | D．had been teaching |
Thank you for giving up your coffee break to help. I know you always need _________after three classes.
| A．that | B．one | C．it | D．this |
According to a new study by a British’s university, learning ________ second language can lead to ________ increase in your brain power.
| A．a; the | B．不填; the | C．a; an | D．the; an |
She spent four weeks which she could afford _______ around the country, promoting her new album.
| A．to tour | B．toured | C．touring | D．having toured |
It is said that people are________ likely to tell lies over the phone as they are in emails.
| A．as twice | B．twice as | C．twice more | D．twice than |