Be careful when you cross this busy street. ________, you may get run over by a car. 
#79985
A
If not
B
If so
C
If any
D
If possible
推荐题目
For a moment nothing happened, and then ______ all shouting together.
#79557
A
voices had come
B
came voices
C
voices would come
D
did voices come
_______, Mary talks a lot about her favorite singers after class. 
#83811
A
A quiet student as she may be
B
Quiet student as she may be
C
Be a quiet student as she may
D
Quiet as she may be a student
Only after a baby seal is pushed into the sea by its mother _______to swim.
#80343
A
how will it learn
B
will it learn how
C
it will learn how
D
and it learns how