The Japanese team thinks that research techniques similar to their own could be used to bring about more _______________________.

A．It’s hereditary.
B．The shampoo he used caused it.
C．He combs his hair too much.
D．He is old enough to lose hair.

A．He’ll be speaking at the end of the meeting. [C] He suddenly decided not to speak.
B．He was supposed to speak last night instead. [D] He already spoke very briefly tonight.