Someone ______ at the door. Can you open it?
#36310
A
knocks
B
knocked
C
is knocking
D
was knocking
推荐题目
Everyone ____ to know how ________ to the shopping mall ?
#42491
A
wants, get
B
wants, to get
C
want, getting
D
wants ,to getting
No one knew what        because of the thick fog.
#39880
A
he had happened
B
had happened to him
C
had he happened
D
has happened to him
Our country _______ a lot in the last fifty years. 
#38761
A
will change
B
changed
C
changes
D
has changed