_____ playing dumb with teachers. They know very well their students.
| A．It’s no use | B．There is no doubt | C．It’s no wonder | D．There is no need |
The boss praised the young man for his hard work, though he ____ experience.
| A．was lack of | B．was lacking in | C．lacks of | D．was lacking of |
._____ in thought , he almost ran into the car in front of him .
| A．Losing | B．Having lost | C．Lost | D．To lost |
I'll have you ______ English in six months .
| A．speaking | B．speak | C．spoken | D．be able to speak |
I posted the letter some time _____ the week .
| A．in | B．during | C．throughout | D．within |
Take a taxi , _____ you'll miss your train .
| A．and | B．if | C．otherwise | D．or |