1 . In your life, sometimes you might end up back_________ you started.

A．which

B．when

C．where

D．who

2 . Experts suggest that parents should let their child do tasks that he is physically and mentally capable of doing by himself, ______ will help to build a self-confident kid.

A．that

B．who

C．which

D．what

3 . One main reason comes from the Chinese tradition _______ the mother of the young woman usually requires her future son-in-law to prepare a house for their marriage, which brings financial pressure to the young man and his family.

A．what

B．that

C．which

D．When

4 . Many people can’t learn any lessons from the mistakes they’ve made __________ they get hurt somehow.

A．whether

B．unless

C．if

D．as