Our son doesn’t know what to ______ at the university；he can’t make up his mind about his future.
A．take in B．take up C．take over D．take after
I’m living in the apartment nearby. Come and see me whenever________.
A．it is convenient B．you are convenient
C．you have convenience D．there is convenience
—I hear that you will be on travel again.
—Yeah. My boss __________ for me to discuss business details with someone from another company.
A．asked B．arranged C．sent D．called
Not until the early years of the 19th century ________ what heat was.
A. man did know B. did man knew C. didn't man know D. did man know
__________cleaning the yard and making up the beds for the old，we also read newspapers for them and had chats with them.
A．Except for B．Rather than C．Apart from D．Instead of
The more one is ______ the English－speaking environment，the better he or she will learn the language.
A．exposed to B．filled in C．caught on D．kept up
