1 . If        in a scientific way, this kind of dog will be able to work as a guide for the blind.

A．training

B．having trained

C．trained

D．to train

2 . Despite the widely shared desire to give more compliments to a friend who has handles a tense situation at work, when ________ with the decision to actually send the compliments,   people still often hesitate to engage in this behavior.

A．facing

B．faced

C．being faced

D．having faced