Smoking is one of the ________causes of cancer,killing millions of people each year. 
#18972
A
major
B
similar
C
commercial
D
chemical
推荐题目
Facing the ______ situation , Tom looked ________.
#19539
A
puzzling; puzzled
B
puzzling; puzzling
C
puzzled; puzzled
D
puzzled; puzzling
Anne looks______in red while green clothes are nice ______Helen.
#20484
A
good; on
B
well; in
C
good; at
D
well; for