英语高手进！！！急需~~

Question

1 I saw him yesterday: he just dropped__ for a chat.(in/ on/ away/ through/ up)
2 Things are changing so fast, I can't keep___ . (in/ away/ through/ up)

Answer 1

1. in，句子译文：我昨日见到他,他只是顺便聊了一下
2. up，句子译文：事物改变得如此快,我跟不上步伐

词组意思：
drop in
顺便走访(某人); 顺便进去
drop on
偶然遇到; 偶然发现
drop away
离开, 散去
drop through
崩溃, 失败
drop up
不期来到

keep in
抑制, 隐瞒, 隐藏,
keep away
防范，远离...
keep up
不落后，跟上步伐, 维持
keep through (似乎没这个说法）

Answer 2

mx啊，百度知道是个好东东。。。
in
up
给我分吧。。。

Answer 3

in up

Answer 4

我想说你怎么这么用功?

Answer 5

缪大神...这个好像也不是很难吧...
in up

Answer 6

I
believe
that
"no
pains,
no
gains