______your compositions carefully and some spelling mistakes can be avoided.
#30383
A
Having checked
B
Check
C
Checked
D
To check
推荐题目
Cloning plants is straightforward cloning animals is very complicated .
#34234
A
so that
B
although
C
while
D
as if
The users of this new mobile phone can type in e-mails or long texts easily _______ they happen to be.
#30636
A
where
B
wherever
C
what
D
which
No one knows exactly ______ this important discovery was made.
#33284
A
that
B
that how
C
what
D
when