1．－It’s said that scientists have made _____ big breakthrough in the cancer treatment.
－If so, many people can have been brought back to ____ life!
A a; / B. /; a C. the; the D. a; the
1．【解析】选A。考查冠词。make a breakthrough “突破,取得突破性成就”；come back to life“复活，活跃起来”。都是固定短语，所以选A。
2．Tom went to open the door. ______ his father began to wash dishes.
A. However B. Nevertheless C. Besides D. Meanwhile
2.【解析】选D。句意：汤姆去开门，在此期间，他爸爸开始洗碗。meanwhile “在此期间，与此同时”，选D。
