UNIT61. I said I would do it and I _ my promise. A) stand up to B) stand for C) stand by D) stand up for2. Mr. Morgan can be very sad _, though in public he is extremely cheerful. A) by oneself B) in person C) in private D) as individual3. Color-blind people often find it difficult to _ between blue and green. A) separate B) distinguish C) compareD) contrast4. Keeping what belongs to another _ to stealing. A) appliesB) accounts
