1 . Her English teacher has taught me a lot, _______she is grateful.

A．for which

B．for that

C．of which

D．at whom

2 . These new neighbors, ________ I was introduced yesterday, have come here from Singapore.

A．with which

B．with whom

C．to which

D．to whom

3 . Ryan had raised the 2,000 dollars, ________ a well was built near a primary school in Uganda.

A．for which

B．about which

C．with which

D．from which