________ we deal with our problems, we can easily become unhappy.
#55210
A
Until
B
If
C
Unless
D
Though
推荐题目
____________the trousers? They’re very nice. They feel soft and smooth. 
#55898
A
What do you think of
B
What do you like
C
How do you do
D
How would you like
Youwillfallbehind others     youwork hard.
#57333
A
if
B
unless
C
though
D
since