We’ll have a picnic if it ______ tomorrow. 
#37768
A
rains
B
will rain
C
doesn’t rain
D
won’t rain
推荐题目
The manager ____ nothing about the matter ____ he read his secretary’s report.
#38680
A
had known, when
B
has known, before
C
will know, after
D
knew, until
My mother _______________ my aunt called her.
#41811
A
was cooking while
B
cooked when
C
cooked while
D
was cooking when
Yesterday, when I went past the classroom, I _______ someone _______.
#42070
A
hear, singing
B
heard, singing
C
heard, sang
D
hear, sang