问题
______ the news, so far, has been good, there may be bad days ahead[ ]
A: When
B: While
C: If
D: Since
B: While
C: If
D: Since
正确答案是：
同类题型
How do you like the good singer Yao Beina — She is so great. But she _______ for only 4 months.
We must take measures to stop various kinds of pollution ______ the environment gets worse.
The flowers over there _________ by the students last year.