单项选择题
A.business B.accident C.matter D.event
It is assumed that students at an intermediate level wi...
单项选择题It is assumed that students at an intermediate level will have a good（）of the basic structures and vocabulary of English.
A.command B.commanding C.to command D.commanded
I am pleased to take（）to exchange views with you.A.this...
单项选择题I am pleased to take（）to exchange views with you.
A.this opportunity B.a chance C.this time D.aperiod
Please leave the key under the door（）you go out.A.in ca...
单项选择题Please leave the key under the door（）you go out.
A.in case B.in the case C.in case of D.in the case of
