Scientists are hoping for a _____ in the search for a cure for cancer.
#6618
A
breakthrough
B
break
C
deal
D
progress
推荐题目
There seemed to be no human beings in that village, and the only ______ of life was a boat tied to a tree.
#5935
A
symbol
B
mark
C
signal
D
sign
Different from popular _________, most good leaders are made, not born.
#5981
A
belief
B
agreement
C
religion
D
Decision
They decided to leave the waiter a big _____ because the food and service had been excellent.
#7485
A
note
B
reward
C
tip
D
gift
