单项选择题
A. whom B. who C. which
We have been good friends ______ we met at school.A. si...
单项选择题We have been good friends ______ we met at school.
They climbed higher （） they might get a better view of ...
单项选择题They climbed higher （） they might get a better view of the city.
A. so that B. because C. in order to
The red suitcase is expensive （） it is made of leather....
单项选择题The red suitcase is expensive （） it is made of leather.
A. when B. if C. because
