如图所示是生活中几种常见的杠杆，其中属于费力杠杆的是 ( )
A．道钉撬B．钢丝钳
C．开瓶扳手D．筷子
We offered to give Sharon a ride home，but she ______，saying that she felt like walking．（ ）
understood
accepted
compromised
declined
﹣Why do people like pop music？I hate it so much．
﹣______ it is not your style，that doesn't mean it is bad．（ ）
Only if
Even though
Now that
In case
The number of medical schools reached 18 in the early 1990s and ______ around that level ever since．（ ）
are remaining
have remained
is remaining
has remained
I never worried about my son while I was away because my mother ______ him．（ ）
drank a toast to
played a joke on
kept an eye on
made an apology to
According to Professor Johnson，we don't have to read the book if we don't want to，as it is ______．（ ）
worthwhile
necessary
optional
serious
道钉撬B．
钢丝钳
开瓶扳手D．
筷子
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