1 . ---Why was it ______ you were so angry？
---Because we failed to take part in the basketball match.

A．which

B．that

C．how

D．when

2 . It is only when an NBA player has aged and been through many battles ______ he learns an
important lesson; there is no “I” in “team”．

A．after

B．before

C．what

D．that

3 . It is not when to start the job but who to start ______is of importance.

A．which

B．it

C．that

D．this